90289428 has 12 divisors (see below), whose sum is σ = 210675360. Its totient is φ = 30096472.

The previous prime is 90289427. The next prime is 90289447. The reversal of 90289428 is 82498209.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 90289428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90289427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3762048 + ... + 3762071.

It is an arithmetic number, because the mean of its divisors is an integer number (17556280).

Almost surely, 2^90289428 is an apocalyptic number.

It is an amenable number.

90289428 is an abundant number, since it is smaller than the sum of its proper divisors (120385932).

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

90289428 is a wasteful number, since it uses less digits than its factorization.

90289428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7524126 (or 7524124 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 90289428 is about 9502.0749312979. The cubic root of 90289428 is about 448.6203472921.

The spelling of 90289428 in words is "ninety million, two hundred eighty-nine thousand, four hundred twenty-eight".