1148640240 has 160 divisors (see below), whose sum is σ = 4053597696. Its totient is φ = 266337280.

The previous prime is 1148640223. The next prime is 1148640253. The reversal of 1148640240 is 420468411.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1148640198 and 1148640207.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 51262 + ... + 70178.

Almost surely, 2^1148640240 is an apocalyptic number.

1148640240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1148640240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2026798848).

1148640240 is an abundant number, since it is smaller than the sum of its proper divisors (2904957456).

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

1148640240 is a wasteful number, since it uses less digits than its factorization.

1148640240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18967 (or 18961 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 1148640240 is about 33891.5954183334. The cubic root of 1148640240 is about 1047.2764609395.

The spelling of 1148640240 in words is "one billion, one hundred forty-eight million, six hundred forty thousand, two hundred forty".