90231928 has 16 divisors (see below), whose sum is σ = 169285680. Its totient is φ = 45089088.

The previous prime is 90231913. The next prime is 90231949. The reversal of 90231928 is 82913209.

It is a junction number, because it is equal to n+sod(n) for n = 90231893 and 90231902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24325 + ... + 27787.

It is an arithmetic number, because the mean of its divisors is an integer number (10580355).

Almost surely, 2^90231928 is an apocalyptic number.

It is an amenable number.

90231928 is a deficient number, since it is larger than the sum of its proper divisors (79053752).

90231928 is a wasteful number, since it uses less digits than its factorization.

90231928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6726 (or 6722 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 90231928 is about 9499.0487944846. The cubic root of 90231928 is about 448.5250938078.

The spelling of 90231928 in words is "ninety million, two hundred thirty-one thousand, nine hundred twenty-eight".