90145842 has 16 divisors (see below), whose sum is σ = 189780960. Its totient is φ = 28467072.

The previous prime is 90145841. The next prime is 90145879. The reversal of 90145842 is 24854109.

It is not an unprimeable number, because it can be changed into a prime (90145841) by changing a digit.

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, 395263 + ... + 395490.

It is an arithmetic number, because the mean of its divisors is an integer number (11861310).

Almost surely, 2^90145842 is an apocalyptic number.

90145842 is an abundant number, since it is smaller than the sum of its proper divisors (99635118).

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

90145842 is a wasteful number, since it uses less digits than its factorization.

90145842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790777.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 90145842 is about 9494.5164173854. The cubic root of 90145842 is about 448.3824095873.

The spelling of 90145842 in words is "ninety million, one hundred forty-five thousand, eight hundred forty-two".