781051040 has 96 divisors (see below), whose sum is σ = 2300586624. Its totient is φ = 243440640.

The previous prime is 781051039. The next prime is 781051057. The reversal of 781051040 is 40150187.

It is a super-2 number, since 2×781051040² = 1220081454170163200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19379 + ... + 44018.

It is an arithmetic number, because the mean of its divisors is an integer number (23964444).

Almost surely, 2^781051040 is an apocalyptic number.

781051040 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

781051040 is an abundant number, since it is smaller than the sum of its proper divisors (1519535584).

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

781051040 is a wasteful number, since it uses less digits than its factorization.

781051040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63430 (or 63422 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 781051040 is about 27947.2903874419. The cubic root of 781051040 is about 920.9296840321.

The spelling of 781051040 in words is "seven hundred eighty-one million, fifty-one thousand, forty".