90120552 has 16 divisors (see below), whose sum is σ = 225301440. Its totient is φ = 30040176.

The previous prime is 90120539. The next prime is 90120557. The reversal of 90120552 is 25502109.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 3755023 = 90120552 / (9 + 0 + 1 + 2 + 0 + 5 + 5 + 2).

It is not an unprimeable number, because it can be changed into a prime (90120557) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1877488 + ... + 1877535.

It is an arithmetic number, because the mean of its divisors is an integer number (14081340).

Almost surely, 2^90120552 is an apocalyptic number.

It is an amenable number.

90120552 is an abundant number, since it is smaller than the sum of its proper divisors (135180888).

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

90120552 is a wasteful number, since it uses less digits than its factorization.

90120552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3755032 (or 3755028 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 90120552 is about 9493.1845025787. The cubic root of 90120552 is about 448.3404751269.

The spelling of 90120552 in words is "ninety million, one hundred twenty thousand, five hundred fifty-two".