90425642 has 16 divisors (see below), whose sum is σ = 138261600. Its totient is φ = 44342160.

The previous prime is 90425633. The next prime is 90425653. The reversal of 90425642 is 24652409.

It is a super-2 number, since 2×90425642² = 16353593462224328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90425599 and 90425608.

It is an unprimeable number.

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, 80984 + ... + 82092.

It is an arithmetic number, because the mean of its divisors is an integer number (8641350).

Almost surely, 2^90425642 is an apocalyptic number.

90425642 is a deficient number, since it is larger than the sum of its proper divisors (47835958).

90425642 is a wasteful number, since it uses less digits than its factorization.

90425642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1861.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 90425642 is about 9509.2398224043. The cubic root of 90425642 is about 448.8458357350.

The spelling of 90425642 in words is "ninety million, four hundred twenty-five thousand, six hundred forty-two".