90435138 has 16 divisors (see below), whose sum is σ = 191509920. Its totient is φ = 28371776.

The previous prime is 90435131. The next prime is 90435151. The reversal of 90435138 is 83153409.

It is a junction number, because it is equal to n+sod(n) for n = 90435099 and 90435108.

It is not an unprimeable number, because it can be changed into a prime (90435131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 443208 + ... + 443411.

It is an arithmetic number, because the mean of its divisors is an integer number (11969370).

Almost surely, 2^90435138 is an apocalyptic number.

90435138 is an abundant number, since it is smaller than the sum of its proper divisors (101074782).

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

90435138 is a wasteful number, since it uses less digits than its factorization.

90435138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886641.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 90435138 is about 9509.7391131408. The cubic root of 90435138 is about 448.8615469528.

The spelling of 90435138 in words is "ninety million, four hundred thirty-five thousand, one hundred thirty-eight".