90812642 has 16 divisors (see below), whose sum is σ = 137832192. Its totient is φ = 44871840.

The previous prime is 90812641. The next prime is 90812651. The reversal of 90812642 is 24621809.

It is a junction number, because it is equal to n+sod(n) for n = 90812599 and 90812608.

It is not an unprimeable number, because it can be changed into a prime (90812641) 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, 73643 + ... + 74865.

It is an arithmetic number, because the mean of its divisors is an integer number (8614512).

Almost surely, 2^90812642 is an apocalyptic number.

90812642 is a deficient number, since it is larger than the sum of its proper divisors (47019550).

90812642 is a wasteful number, since it uses less digits than its factorization.

90812642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 90812642 is about 9529.5667267720. The cubic root of 90812642 is about 449.4852418417.

The spelling of 90812642 in words is "ninety million, eight hundred twelve thousand, six hundred forty-two".