90290655 has 96 divisors (see below), whose sum is σ = 204107904. Its totient is φ = 35831808.

The previous prime is 90290653. The next prime is 90290671. The reversal of 90290655 is 55609209.

It is not a de Polignac number, because 90290655 - 2¹ = 90290653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90290653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 68967 + ... + 70263.

It is an arithmetic number, because the mean of its divisors is an integer number (2126124).

Almost surely, 2^90290655 is an apocalyptic number.

90290655 is an abundant number, since it is smaller than the sum of its proper divisors (113817249).

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

90290655 is a wasteful number, since it uses less digits than its factorization.

90290655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345 (or 1342 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 90290655 is about 9502.1394959241. The cubic root of 90290655 is about 448.6223794778.

The spelling of 90290655 in words is "ninety million, two hundred ninety thousand, six hundred fifty-five".