90728635 has 8 divisors (see below), whose sum is σ = 109706256. Its totient is φ = 72028320.

The previous prime is 90728623. The next prime is 90728641. The reversal of 90728635 is 53682709.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90728635 - 2¹⁹ = 90204347 is a prime.

It is a Duffinian 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, 68604 + ... + 69913.

It is an arithmetic number, because the mean of its divisors is an integer number (13713282).

Almost surely, 2^90728635 is an apocalyptic number.

90728635 is a deficient number, since it is larger than the sum of its proper divisors (18977621).

90728635 is a wasteful number, since it uses less digits than its factorization.

90728635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138653.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 90728635 is about 9525.1580039388. The cubic root of 90728635 is about 449.3465990447.

The spelling of 90728635 in words is "ninety million, seven hundred twenty-eight thousand, six hundred thirty-five".