90740728 has 32 divisors (see below), whose sum is σ = 183702960. Its totient is φ = 41771520.

The previous prime is 90740719. The next prime is 90740777. The reversal of 90740728 is 82704709.

It is a happy number.

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, 50176 + ... + 51952.

Almost surely, 2^90740728 is an apocalyptic number.

It is an amenable number.

90740728 is an abundant number, since it is smaller than the sum of its proper divisors (92962232).

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

90740728 is a wasteful number, since it uses less digits than its factorization.

90740728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2287 (or 2283 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 90740728 is about 9525.7927754072. The cubic root of 90740728 is about 449.3665622644.

The spelling of 90740728 in words is "ninety million, seven hundred forty thousand, seven hundred twenty-eight".