32640990 has 32 divisors (see below), whose sum is σ = 78567840. Its totient is φ = 8678784.

The previous prime is 32640989. The next prime is 32640991. The reversal of 32640990 is 9904623.

It is an interprime number because it is at equal distance from previous prime (32640989) and next prime (32640991).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32640991) 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, 10272 + ... + 13068.

It is an arithmetic number, because the mean of its divisors is an integer number (2455245).

Almost surely, 2^32640990 is an apocalyptic number.

32640990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

32640990 is an abundant number, since it is smaller than the sum of its proper divisors (45926850).

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

32640990 is a wasteful number, since it uses less digits than its factorization.

32640990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3196.

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

The square root of 32640990 is about 5713.2293845075. The cubic root of 32640990 is about 319.5860206615.

The spelling of 32640990 in words is "thirty-two million, six hundred forty thousand, nine hundred ninety".