90285972 has 24 divisors (see below), whose sum is σ = 240762816. Its totient is φ = 25795968.

The previous prime is 90285953. The next prime is 90285973. The reversal of 90285972 is 27958209.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90285973) 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 7 ways as a sum of consecutive naturals, for example, 537333 + ... + 537500.

It is an arithmetic number, because the mean of its divisors is an integer number (10031784).

Almost surely, 2^90285972 is an apocalyptic number.

It is an amenable number.

90285972 is an abundant number, since it is smaller than the sum of its proper divisors (150476844).

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

90285972 is a wasteful number, since it uses less digits than its factorization.

90285972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074847 (or 1074845 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 90285972 is about 9501.8930745405. The cubic root of 90285972 is about 448.6146232860.

The spelling of 90285972 in words is "ninety million, two hundred eighty-five thousand, nine hundred seventy-two".