1864818440 has 64 divisors (see below), whose sum is σ = 4256280000. Its totient is φ = 735264000.

The previous prime is 1864818433. The next prime is 1864818467. The reversal of 1864818440 is 448184681.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1864818391 and 1864818400.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 827315 + ... + 829565.

It is an arithmetic number, because the mean of its divisors is an integer number (66504375).

Almost surely, 2^1864818440 is an apocalyptic number.

1864818440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1864818440 is an abundant number, since it is smaller than the sum of its proper divisors (2391461560).

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

1864818440 is a wasteful number, since it uses less digits than its factorization.

1864818440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2550 (or 2546 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 44.

The square root of 1864818440 is about 43183.5436248578. The cubic root of 1864818440 is about 1230.8699950233.

The spelling of 1864818440 in words is "one billion, eight hundred sixty-four million, eight hundred eighteen thousand, four hundred forty".