90729550 has 24 divisors (see below), whose sum is σ = 173321496. Its totient is φ = 35310240.

The previous prime is 90729539. The next prime is 90729553. The reversal of 90729550 is 5592709.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90729553) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 22672 + ... + 26371.

It is an arithmetic number, because the mean of its divisors is an integer number (7221729).

Almost surely, 2^90729550 is an apocalyptic number.

90729550 is a deficient number, since it is larger than the sum of its proper divisors (82591946).

90729550 is a wasteful number, since it uses less digits than its factorization.

90729550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49092 (or 49087 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 37.

The square root of 90729550 is about 9525.2060345170. The cubic root of 90729550 is about 449.3481095960.

The spelling of 90729550 in words is "ninety million, seven hundred twenty-nine thousand, five hundred fifty".