90154990 has 32 divisors (see below), whose sum is σ = 165512160. Its totient is φ = 35351424.

The previous prime is 90154979. The next prime is 90154991. The reversal of 90154990 is 9945109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90154991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116244 + ... + 117016.

It is an arithmetic number, because the mean of its divisors is an integer number (5172255).

Almost surely, 2^90154990 is an apocalyptic number.

90154990 is a deficient number, since it is larger than the sum of its proper divisors (75357170).

90154990 is a wasteful number, since it uses less digits than its factorization.

90154990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 90154990 is about 9494.9981569245. The cubic root of 90154990 is about 448.3975763565.

The spelling of 90154990 in words is "ninety million, one hundred fifty-four thousand, nine hundred ninety".