32499990 has 24 divisors (see below), whose sum is σ = 84500208. Its totient is φ = 8666640.

The previous prime is 32499979. The next prime is 32499991. The reversal of 32499990 is 9999423.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32499991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 180466 + ... + 180645.

It is an arithmetic number, because the mean of its divisors is an integer number (3520842).

Almost surely, 2^32499990 is an apocalyptic number.

32499990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

32499990 is an abundant number, since it is smaller than the sum of its proper divisors (52000218).

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

32499990 is a wasteful number, since it uses less digits than its factorization.

32499990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361124 (or 361121 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The square root of 32499990 is about 5700.8762484376. The cubic root of 32499990 is about 319.1251822122.

It can be divided in two parts, 32499 and 990, that added together give a square (33489 = 183²).

The spelling of 32499990 in words is "thirty-two million, four hundred ninety-nine thousand, nine hundred ninety".