91438072 has 16 divisors (see below), whose sum is σ = 187032600. Its totient is φ = 41562720.

The previous prime is 91438069. The next prime is 91438079. The reversal of 91438072 is 27083419.

It is a super-2 number, since 2×91438072² = 16721842022154368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91438079) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 519447 + ... + 519622.

Almost surely, 2^91438072 is an apocalyptic number.

It is an amenable number.

91438072 is an abundant number, since it is smaller than the sum of its proper divisors (95594528).

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

91438072 is a wasteful number, since it uses less digits than its factorization.

91438072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039086 (or 1039082 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 91438072 is about 9562.3256585414. The cubic root of 91438072 is about 450.5147558014.

The spelling of 91438072 in words is "ninety-one million, four hundred thirty-eight thousand, seventy-two".