90136338 has 16 divisors (see below), whose sum is σ = 181218816. Its totient is φ = 29887760.

The previous prime is 90136337. The next prime is 90136381. The reversal of 90136338 is 83363109.

It is a junction number, because it is equal to n+sod(n) for n = 90136299 and 90136308.

It is not an unprimeable number, because it can be changed into a prime (90136331) 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, 38181 + ... + 40472.

It is an arithmetic number, because the mean of its divisors is an integer number (11326176).

Almost surely, 2^90136338 is an apocalyptic number.

90136338 is an abundant number, since it is smaller than the sum of its proper divisors (91082478).

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

90136338 is a wasteful number, since it uses less digits than its factorization.

90136338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78849.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 90136338 is about 9494.0159047686. The cubic root of 90136338 is about 448.3666515072.

It can be divided in two parts, 9013 and 6338, that added together give a palindrome (15351).

The spelling of 90136338 in words is "ninety million, one hundred thirty-six thousand, three hundred thirty-eight".