90451372 has 18 divisors (see below), whose sum is σ = 173989004. Its totient is φ = 41114040.

The previous prime is 90451369. The next prime is 90451393. The reversal of 90451372 is 27315409.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 92958 + ... + 93925.

Almost surely, 2^90451372 is an apocalyptic number.

It is an amenable number.

90451372 is a deficient number, since it is larger than the sum of its proper divisors (83537632).

90451372 is a wasteful number, since it uses less digits than its factorization.

90451372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186909 (or 186896 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 90451372 is about 9510.5926208623. The cubic root of 90451372 is about 448.8884037054. Note that the first 3 decimals are identical.

The spelling of 90451372 in words is "ninety million, four hundred fifty-one thousand, three hundred seventy-two".