32490072 has 72 divisors (see below), whose sum is σ = 91521300. Its totient is φ = 10812528.

The previous prime is 32490071. The next prime is 32490079. The reversal of 32490072 is 27009423.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32490071) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 52179 + ... + 52797.

Almost surely, 2^32490072 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 32490072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45760650).

32490072 is an abundant number, since it is smaller than the sum of its proper divisors (59031228).

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

32490072 is an frugal number, since it uses more digits than its factorization.

32490072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649 (or 624 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 32490072 is about 5700.0063157860. The cubic root of 32490072 is about 319.0927165040.

Adding to 32490072 its reverse (27009423), we get a palindrome (59499495).

The spelling of 32490072 in words is "thirty-two million, four hundred ninety thousand, seventy-two".