91649404 has 36 divisors (see below), whose sum is σ = 203537880. Its totient is φ = 35706720.

The previous prime is 91649377. The next prime is 91649413. The reversal of 91649404 is 40494619.

It is a super-2 number, since 2×91649404² = 16799226507110432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19099 + ... + 23410.

It is an arithmetic number, because the mean of its divisors is an integer number (5653830).

Almost surely, 2^91649404 is an apocalyptic number.

It is an amenable number.

91649404 is an abundant number, since it is smaller than the sum of its proper divisors (111888476).

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

91649404 is a wasteful number, since it uses less digits than its factorization.

91649404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42538 (or 42529 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 91649404 is about 9573.3695217515. The cubic root of 91649404 is about 450.8615658621.

The spelling of 91649404 in words is "ninety-one million, six hundred forty-nine thousand, four hundred four".