32890640 has 40 divisors (see below), whose sum is σ = 79113240. Its totient is φ = 12701696.

The previous prime is 32890639. The next prime is 32890643. The reversal of 32890640 is 4609823.

It can be written as a sum of positive squares in 4 ways, for example, as 13424896 + 19465744 = 3664^2 + 4412^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 32890597 and 32890606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32890643) 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, 4769 + ... + 9408.

It is an arithmetic number, because the mean of its divisors is an integer number (1977831).

Almost surely, 2^32890640 is an apocalyptic number.

It is an amenable number.

32890640 is an abundant number, since it is smaller than the sum of its proper divisors (46222600).

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

32890640 is a wasteful number, since it uses less digits than its factorization.

32890640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14219 (or 14213 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 32890640 is about 5735.0361812285. The cubic root of 32890640 is about 320.3987217342.

The spelling of 32890640 in words is "thirty-two million, eight hundred ninety thousand, six hundred forty".