1018358640 has 120 divisors (see below), whose sum is σ = 3683097600. Its totient is φ = 250670592.

The previous prime is 1018358639. The next prime is 1018358641. The reversal of 1018358640 is 468538101.

1018358640 is a `hidden beast` number, since 1 + 0 + 1 + 8 + 3 + 5 + 8 + 640 = 666.

It is an interprime number because it is at equal distance from previous prime (1018358639) and next prime (1018358641).

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-3 number, since 3×1018358640³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1018358595 and 1018358604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1018358641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45040 + ... + 63759.

It is an arithmetic number, because the mean of its divisors is an integer number (30692480).

Almost surely, 2^1018358640 is an apocalyptic number.

1018358640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1018358640 is an abundant number, since it is smaller than the sum of its proper divisors (2664738960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1018358640 is a wasteful number, since it uses less digits than its factorization.

1018358640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108831 (or 108822 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 1018358640 is about 31911.7320119106. The cubic root of 1018358640 is about 1006.0824751526.

The spelling of 1018358640 in words is "one billion, eighteen million, three hundred fifty-eight thousand, six hundred forty".