90578740 has 24 divisors (see below), whose sum is σ = 217389312. Its totient is φ = 31055520.

The previous prime is 90578693. The next prime is 90578743. The reversal of 90578740 is 4787509.

It is a junction number, because it is equal to n+sod(n) for n = 90578693 and 90578702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90578743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323356 + ... + 323635.

It is an arithmetic number, because the mean of its divisors is an integer number (9057888).

Almost surely, 2^90578740 is an apocalyptic number.

It is an amenable number.

90578740 is an abundant number, since it is smaller than the sum of its proper divisors (126810572).

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

90578740 is a wasteful number, since it uses less digits than its factorization.

90578740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647007 (or 647005 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 90578740 is about 9517.2863779546. The cubic root of 90578740 is about 449.0990038014.

The spelling of 90578740 in words is "ninety million, five hundred seventy-eight thousand, seven hundred forty".