781486972 has 12 divisors (see below), whose sum is σ = 1562974000. Its totient is φ = 334922976.

The previous prime is 781486969. The next prime is 781486987. The reversal of 781486972 is 279684187.

781486972 is an admirable number.

It is a super-2 number, since 2×781486972² = 1221443774811457568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13955097 + ... + 13955152.

Almost surely, 2^781486972 is an apocalyptic number.

It is an amenable number.

781486972 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

781486972 is a wasteful number, since it uses less digits than its factorization.

781486972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27910260 (or 27910258 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 52.

The square root of 781486972 is about 27955.0884813481. The cubic root of 781486972 is about 921.1009865597.

The spelling of 781486972 in words is "seven hundred eighty-one million, four hundred eighty-six thousand, nine hundred seventy-two".