90972038 has 16 divisors (see below), whose sum is σ = 149886720. Its totient is φ = 41218056.

The previous prime is 90972031. The next prime is 90972053. The reversal of 90972038 is 83027909.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 90971992 and 90972010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90972031) 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, 51170 + ... + 52917.

It is an arithmetic number, because the mean of its divisors is an integer number (9367920).

Almost surely, 2^90972038 is an apocalyptic number.

90972038 is a deficient number, since it is larger than the sum of its proper divisors (58914682).

90972038 is a wasteful number, since it uses less digits than its factorization.

90972038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104131.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 90972038 is about 9537.9262945359. The cubic root of 90972038 is about 449.7480696839.

The spelling of 90972038 in words is "ninety million, nine hundred seventy-two thousand, thirty-eight".