90890434 has 16 divisors (see below), whose sum is σ = 142640640. Its totient is φ = 43354080.

The previous prime is 90890407. The next prime is 90890453. The reversal of 90890434 is 43409809.

It is a super-2 number, since 2×90890434² = 16522141985416712, which contains 22 as substring.

It is a cake number, because a cake can be divided into 90890434 parts by 817 planar cuts.

It is a junction number, because it is equal to n+sod(n) for n = 90890393 and 90890402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16399 + ... + 21229.

It is an arithmetic number, because the mean of its divisors is an integer number (8915040).

Almost surely, 2^90890434 is an apocalyptic number.

90890434 is a deficient number, since it is larger than the sum of its proper divisors (51750206).

90890434 is a wasteful number, since it uses less digits than its factorization.

90890434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5265.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 90890434 is about 9533.6474656870. The cubic root of 90890434 is about 449.6135513502.

The spelling of 90890434 in words is "ninety million, eight hundred ninety thousand, four hundred thirty-four".