99090434 has 16 divisors (see below), whose sum is σ = 156900480. Its totient is φ = 46805040.

The previous prime is 99090427. The next prime is 99090437. The reversal of 99090434 is 43409099.

It is a super-2 number, since 2×99090434² = 19637828220616712, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (99090437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10679 + ... + 17669.

It is an arithmetic number, because the mean of its divisors is an integer number (9806280).

Almost surely, 2^99090434 is an apocalyptic number.

99090434 is a deficient number, since it is larger than the sum of its proper divisors (57810046).

99090434 is a wasteful number, since it uses less digits than its factorization.

99090434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7385.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 99090434 is about 9954.4178132124. The cubic root of 99090434 is about 462.7473178349.

The spelling of 99090434 in words is "ninety-nine million, ninety thousand, four hundred thirty-four".