91262938428 has 36 divisors (see below), whose sum is σ = 232025925768. Its totient is φ = 30245133600.

The previous prime is 91262938373. The next prime is 91262938441. The reversal of 91262938428 is 82483926219.

91262938428 is a `hidden beast` number, since 9 + 1 + 2 + 629 + 3 + 8 + 4 + 2 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×91262938428² (a number of 23 digits) 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 (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7320598 + ... + 7333053.

Almost surely, 2^91262938428 is an apocalyptic number.

It is an amenable number.

91262938428 is an abundant number, since it is smaller than the sum of its proper divisors (140762987340).

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

91262938428 is a wasteful number, since it uses less digits than its factorization.

91262938428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14653834 (or 14653829 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 54.

The spelling of 91262938428 in words is "ninety-one billion, two hundred sixty-two million, nine hundred thirty-eight thousand, four hundred twenty-eight".