90154988 has 24 divisors (see below), whose sum is σ = 196702464. Its totient is φ = 35125200.

The previous prime is 90154979. The next prime is 90154991. The reversal of 90154988 is 88945109.

It is a super-2 number, since 2×90154988² = 16255843722560288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146048 + ... + 146663.

It is an arithmetic number, because the mean of its divisors is an integer number (8195936).

Almost surely, 2^90154988 is an apocalyptic number.

It is an amenable number.

90154988 is an abundant number, since it is smaller than the sum of its proper divisors (106547476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90154988 is a wasteful number, since it uses less digits than its factorization.

90154988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292733 (or 292731 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 90154988 is about 9494.9980516059. The cubic root of 90154988 is about 448.3975730407.

The spelling of 90154988 in words is "ninety million, one hundred fifty-four thousand, nine hundred eighty-eight".