90129378 has 16 divisors (see below), whose sum is σ = 180361440. Its totient is φ = 30026016.

The previous prime is 90129349. The next prime is 90129379. The reversal of 90129378 is 87392109.

It is not an unprimeable number, because it can be changed into a prime (90129379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11758 + ... + 17846.

It is an arithmetic number, because the mean of its divisors is an integer number (11272590).

Almost surely, 2^90129378 is an apocalyptic number.

90129378 is an abundant number, since it is smaller than the sum of its proper divisors (90232062).

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

90129378 is a wasteful number, since it uses less digits than its factorization.

90129378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8561.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 90129378 is about 9493.6493510136. The cubic root of 90129378 is about 448.3551107965.

The spelling of 90129378 in words is "ninety million, one hundred twenty-nine thousand, three hundred seventy-eight".