32481990 has 48 divisors (see below), whose sum is σ = 85267728. Its totient is φ = 8578368.

The previous prime is 32481989. The next prime is 32482013. The reversal of 32481990 is 9918423.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7944 + ... + 11316.

It is an arithmetic number, because the mean of its divisors is an integer number (1776411).

Almost surely, 2^32481990 is an apocalyptic number.

32481990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 32481990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42633864).

32481990 is an abundant number, since it is smaller than the sum of its proper divisors (52785738).

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

32481990 is a wasteful number, since it uses less digits than its factorization.

32481990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3493 (or 3490 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 32481990 is about 5699.2973251095. The cubic root of 32481990 is about 319.0662558958.

It can be divided in two parts, 32481 and 990, that multiplied together give a triangular number (32156190 = T₈₀₁₉).

The spelling of 32481990 in words is "thirty-two million, four hundred eighty-one thousand, nine hundred ninety".