781612960 has 24 divisors (see below), whose sum is σ = 1846560996. Its totient is φ = 312645120.

The previous prime is 781612919. The next prime is 781612969. The reversal of 781612960 is 69216187.

It can be written as a sum of positive squares in 2 ways, for example, as 757130256 + 24482704 = 27516^2 + 4948^2 .

It is a super-2 number, since 2×781612960² = 1221837638479923200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (781612969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2442381 + ... + 2442700.

Almost surely, 2^781612960 is an apocalyptic number.

It is an amenable number.

781612960 is an abundant number, since it is smaller than the sum of its proper divisors (1064948036).

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

781612960 is a wasteful number, since it uses less digits than its factorization.

781612960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4885096 (or 4885088 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 781612960 is about 27957.3417906639. The cubic root of 781612960 is about 921.1504825588.

The spelling of 781612960 in words is "seven hundred eighty-one million, six hundred twelve thousand, nine hundred sixty".