90641390 has 32 divisors (see below), whose sum is σ = 194572800. Its totient is φ = 29725344.

The previous prime is 90641387. The next prime is 90641401. The reversal of 90641390 is 9314609.

It is a super-2 number, since 2×90641390² = 16431723162264200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26540 + ... + 29759.

It is an arithmetic number, because the mean of its divisors is an integer number (6080400).

Almost surely, 2^90641390 is an apocalyptic number.

90641390 is an abundant number, since it is smaller than the sum of its proper divisors (103931410).

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

90641390 is a wasteful number, since it uses less digits than its factorization.

90641390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56336.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 90641390 is about 9520.5771883852. The cubic root of 90641390 is about 449.2025217210.

Adding to 90641390 its reverse (9314609), we get a palindrome (99955999).

The spelling of 90641390 in words is "ninety million, six hundred forty-one thousand, three hundred ninety".