90437728 has 12 divisors (see below), whose sum is σ = 178049340. Its totient is φ = 45218848.

The previous prime is 90437717. The next prime is 90437761. The reversal of 90437728 is 82773409.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1413058 + ... + 1413121.

It is an arithmetic number, because the mean of its divisors is an integer number (14837445).

Almost surely, 2^90437728 is an apocalyptic number.

It is an amenable number.

90437728 is a deficient number, since it is larger than the sum of its proper divisors (87611612).

90437728 is a wasteful number, since it uses less digits than its factorization.

90437728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2826189 (or 2826181 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 90437728 is about 9509.8752883516. The cubic root of 90437728 is about 448.8658319403.

The spelling of 90437728 in words is "ninety million, four hundred thirty-seven thousand, seven hundred twenty-eight".