90173372 has 24 divisors (see below), whose sum is σ = 169832880. Its totient is φ = 41736960.

The previous prime is 90173371. The next prime is 90173381. The reversal of 90173372 is 27337109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90173371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6722 + ... + 15017.

It is an arithmetic number, because the mean of its divisors is an integer number (7076370).

Almost surely, 2^90173372 is an apocalyptic number.

It is an amenable number.

90173372 is a deficient number, since it is larger than the sum of its proper divisors (79659508).

90173372 is a wasteful number, since it uses less digits than its factorization.

90173372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21821 (or 21819 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 32.

The square root of 90173372 is about 9495.9660909251. The cubic root of 90173372 is about 448.4280493753.

The spelling of 90173372 in words is "ninety million, one hundred seventy-three thousand, three hundred seventy-two".