90981272 has 32 divisors (see below), whose sum is σ = 181191600. Its totient is φ = 42706944.

The previous prime is 90981271. The next prime is 90981277. The reversal of 90981272 is 27218909.

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

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90981271) 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, 14528 + ... + 19824.

Almost surely, 2^90981272 is an apocalyptic number.

It is an amenable number.

90981272 is a deficient number, since it is larger than the sum of its proper divisors (90210328).

90981272 is a wasteful number, since it uses less digits than its factorization.

90981272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5435 (or 5431 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 90981272 is about 9538.4103497386. The cubic root of 90981272 is about 449.7632862027.

The spelling of 90981272 in words is "ninety million, nine hundred eighty-one thousand, two hundred seventy-two".