961936840 has 32 divisors (see below), whose sum is σ = 2291674680. Its totient is φ = 362140672.

The previous prime is 961936819. The next prime is 961936919. The reversal of 961936840 is 48639169.

It can be written as a sum of positive squares in 4 ways, for example, as 742126564 + 219810276 = 27242^2 + 14826^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 706627 + ... + 707986.

Almost surely, 2^961936840 is an apocalyptic number.

It is an amenable number.

961936840 is an abundant number, since it is smaller than the sum of its proper divisors (1329737840).

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

961936840 is a wasteful number, since it uses less digits than its factorization.

961936840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414641 (or 1414637 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 961936840 is about 31015.1066417641. The cubic root of 961936840 is about 987.1478088184.

The spelling of 961936840 in words is "nine hundred sixty-one million, nine hundred thirty-six thousand, eight hundred forty".