961908890 has 16 divisors (see below), whose sum is σ = 1732625640. Its totient is φ = 384499200.

The previous prime is 961908881. The next prime is 961908901. The reversal of 961908890 is 98809169.

It can be written as a sum of positive squares in 4 ways, for example, as 828806521 + 133102369 = 28789^2 + 11537^2 .

It is a super-2 number, since 2×961908890² = 1850537425322064200, which contains 22 as substring.

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, 17411 + ... + 47190.

Almost surely, 2^961908890 is an apocalyptic number.

961908890 is a deficient number, since it is larger than the sum of its proper divisors (770716750).

961908890 is a wasteful number, since it uses less digits than its factorization.

961908890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66097.

The product of its (nonzero) digits is 279936, while the sum is 50.

The square root of 961908890 is about 31014.6560516153. The cubic root of 961908890 is about 987.1382478828.

The spelling of 961908890 in words is "nine hundred sixty-one million, nine hundred eight thousand, eight hundred ninety".