90311442 has 16 divisors (see below), whose sum is σ = 194517120. Its totient is φ = 27788112.

The previous prime is 90311437. The next prime is 90311447. The reversal of 90311442 is 24411309.

It is an interprime number because it is at equal distance from previous prime (90311437) and next prime (90311447).

It is a super-2 number, since 2×90311442² = 16312313112238728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90311447) 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, 578842 + ... + 578997.

It is an arithmetic number, because the mean of its divisors is an integer number (12157320).

Almost surely, 2^90311442 is an apocalyptic number.

90311442 is an abundant number, since it is smaller than the sum of its proper divisors (104205678).

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

90311442 is a wasteful number, since it uses less digits than its factorization.

90311442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157857.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 90311442 is about 9503.2332392718. The cubic root of 90311442 is about 448.6568045903.

The spelling of 90311442 in words is "ninety million, three hundred eleven thousand, four hundred forty-two".