8961392990 has 32 divisors (see below), whose sum is σ = 17625479040. Its totient is φ = 3253399200.

The previous prime is 8961392981. The next prime is 8961393029. The reversal of 8961392990 is 992931698.

It is a super-2 number, since 2×8961392990² (a number of 21 digits) 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 15 ways as a sum of consecutive naturals, for example, 2285 + ... + 133895.

It is an arithmetic number, because the mean of its divisors is an integer number (550796220).

Almost surely, 2^8961392990 is an apocalyptic number.

8961392990 is a deficient number, since it is larger than the sum of its proper divisors (8664086050).

8961392990 is a wasteful number, since it uses less digits than its factorization.

8961392990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132248.

The product of its (nonzero) digits is 1889568, while the sum is 56.

The square root of 8961392990 is about 94664.6343150387. The cubic root of 8961392990 is about 2077.1052704659.

The spelling of 8961392990 in words is "eight billion, nine hundred sixty-one million, three hundred ninety-two thousand, nine hundred ninety".