32289990 has 32 divisors (see below), whose sum is σ = 79301376. Its totient is φ = 8410080.

The previous prime is 32289979. The next prime is 32289997. The reversal of 32289990 is 9998223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32289997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11226 + ... + 13805.

It is an arithmetic number, because the mean of its divisors is an integer number (2478168).

Almost surely, 2^32289990 is an apocalyptic number.

32289990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

32289990 is an abundant number, since it is smaller than the sum of its proper divisors (47011386).

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

32289990 is a wasteful number, since it uses less digits than its factorization.

32289990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25084.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 32289990 is about 5682.4281781647. The cubic root of 32289990 is about 318.4363496774.

The spelling of 32289990 in words is "thirty-two million, two hundred eighty-nine thousand, nine hundred ninety".