1240039872 has 42 divisors (see below), whose sum is σ = 3554352048. Its totient is φ = 413346432.

The previous prime is 1240039859. The next prime is 1240039901. The reversal of 1240039872 is 2789300421.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1075848 + ... + 1076999.

Almost surely, 2^1240039872 is an apocalyptic number.

1240039872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1240039872 is an abundant number, since it is smaller than the sum of its proper divisors (2314312176).

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

1240039872 is a wasteful number, since it uses less digits than its factorization.

1240039872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2152865 (or 2152852 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 1240039872 is about 35214.1998631234. The cubic root of 1240039872 is about 1074.3485859106.

The spelling of 1240039872 in words is "one billion, two hundred forty million, thirty-nine thousand, eight hundred seventy-two".