90578620 has 24 divisors (see below), whose sum is σ = 207507888. Its totient is φ = 32937600.

The previous prime is 90578599. The next prime is 90578641. The reversal of 90578620 is 2687509.

It is an interprime number because it is at equal distance from previous prime (90578599) and next prime (90578641).

It is a super-2 number, since 2×90578620² = 16408972802208800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 90578620.

It is a congruent number.

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, 205641 + ... + 206080.

It is an arithmetic number, because the mean of its divisors is an integer number (8646162).

Almost surely, 2^90578620 is an apocalyptic number.

It is an amenable number.

90578620 is an abundant number, since it is smaller than the sum of its proper divisors (116929268).

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

90578620 is a wasteful number, since it uses less digits than its factorization.

90578620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411741 (or 411739 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 90578620 is about 9517.2800736345. The cubic root of 90578620 is about 449.0988054770.

The spelling of 90578620 in words is "ninety million, five hundred seventy-eight thousand, six hundred twenty".