91125028 has 24 divisors (see below), whose sum is σ = 163820160. Its totient is φ = 44335200.

The previous prime is 91125017. The next prime is 91125031. The reversal of 91125028 is 82052119.

It is a junction number, because it is equal to n+sod(n) for n = 91124987 and 91125005.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21925 + ... + 25747.

It is an arithmetic number, because the mean of its divisors is an integer number (6825840).

Almost surely, 2^91125028 is an apocalyptic number.

It is an amenable number.

91125028 is a deficient number, since it is larger than the sum of its proper divisors (72695132).

91125028 is a wasteful number, since it uses less digits than its factorization.

91125028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3987 (or 3985 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 91125028 is about 9545.9430126101. The cubic root of 91125028 is about 450.0000460905. Note that the first 4 decimals are identical.

Subtracting from 91125028 its sum of digits (28), we obtain a cube (91125000 = 450³).

The spelling of 91125028 in words is "ninety-one million, one hundred twenty-five thousand, twenty-eight".