90439660 has 36 divisors (see below), whose sum is σ = 201765312. Its totient is φ = 34045696.

The previous prime is 90439631. The next prime is 90439667. The reversal of 90439660 is 6693409.

It is not an unprimeable number, because it can be changed into a prime (90439667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2044 + ... + 13603.

It is an arithmetic number, because the mean of its divisors is an integer number (5604592).

Almost surely, 2^90439660 is an apocalyptic number.

It is an amenable number.

90439660 is an abundant number, since it is smaller than the sum of its proper divisors (111325652).

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

90439660 is a wasteful number, since it uses less digits than its factorization.

90439660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15690 (or 15671 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 90439660 is about 9509.9768664282. The cubic root of 90439660 is about 448.8690282561.

The spelling of 90439660 in words is "ninety million, four hundred thirty-nine thousand, six hundred sixty".