99090042 has 64 divisors (see below), whose sum is σ = 219542400. Its totient is φ = 29675520.

The previous prime is 99090041. The next prime is 99090067. The reversal of 99090042 is 24009099.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 99089985 and 99090012.

It is not an unprimeable number, because it can be changed into a prime (99090041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 411042 + ... + 411282.

It is an arithmetic number, because the mean of its divisors is an integer number (3430350).

Almost surely, 2^99090042 is an apocalyptic number.

99090042 is an abundant number, since it is smaller than the sum of its proper divisors (120452358).

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

99090042 is a wasteful number, since it uses less digits than its factorization.

99090042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 99090042 is about 9954.3981234427. The cubic root of 99090042 is about 462.7467076274.

The spelling of 99090042 in words is "ninety-nine million, ninety thousand, forty-two".