90738765 has 64 divisors (see below), whose sum is σ = 175392000. Its totient is φ = 44243712.

The previous prime is 90738761. The next prime is 90738773. The reversal of 90738765 is 56783709.

It is a happy number.

It is not a de Polignac number, because 90738765 - 2² = 90738761 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 90738765.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90738761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 261322 + ... + 261668.

It is an arithmetic number, because the mean of its divisors is an integer number (2740500).

Almost surely, 2^90738765 is an apocalyptic number.

It is an amenable number.

90738765 is a deficient number, since it is larger than the sum of its proper divisors (84653235).

90738765 is a wasteful number, since it uses less digits than its factorization.

90738765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 90738765 is about 9525.6897388063. The cubic root of 90738765 is about 449.3633218491.

The spelling of 90738765 in words is "ninety million, seven hundred thirty-eight thousand, seven hundred sixty-five".