90891916 has 36 divisors (see below), whose sum is σ = 169008840. Its totient is φ = 42743680.

The previous prime is 90891893. The next prime is 90891923. The reversal of 90891916 is 61919809.

It is a super-2 number, since 2×90891916² = 16522680788302112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137595 + ... + 138253.

It is an arithmetic number, because the mean of its divisors is an integer number (4694690).

Almost surely, 2^90891916 is an apocalyptic number.

It is an amenable number.

90891916 is a deficient number, since it is larger than the sum of its proper divisors (78116924).

90891916 is a wasteful number, since it uses less digits than its factorization.

90891916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762 (or 731 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 43.

The square root of 90891916 is about 9533.7251900818. The cubic root of 90891916 is about 449.6159950385.

The spelling of 90891916 in words is "ninety million, eight hundred ninety-one thousand, nine hundred sixteen".