90891042 has 16 divisors (see below), whose sum is σ = 198307872. Its totient is φ = 27542720.

The previous prime is 90891029. The next prime is 90891083. The reversal of 90891042 is 24019809.

It is a super-2 number, since 2×90891042² = 16522363031691528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 90890994 and 90891012.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 688503 + ... + 688634.

It is an arithmetic number, because the mean of its divisors is an integer number (12394242).

Almost surely, 2^90891042 is an apocalyptic number.

90891042 is an abundant number, since it is smaller than the sum of its proper divisors (107416830).

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

90891042 is a wasteful number, since it uses less digits than its factorization.

90891042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377153.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 90891042 is about 9533.6793526948. The cubic root of 90891042 is about 449.6145538922.

The spelling of 90891042 in words is "ninety million, eight hundred ninety-one thousand, forty-two".