32572540 has 96 divisors (see below), whose sum is σ = 91897344. Its totient is φ = 9365760.

The previous prime is 32572523. The next prime is 32572541. The reversal of 32572540 is 4527523.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 32572499 and 32572508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32572541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19207 + ... + 20833.

It is an arithmetic number, because the mean of its divisors is an integer number (957264).

Almost surely, 2^32572540 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 32572540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45948672).

32572540 is an abundant number, since it is smaller than the sum of its proper divisors (59324804).

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

32572540 is a wasteful number, since it uses less digits than its factorization.

32572540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667 (or 1665 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 32572540 is about 5707.2357582283. The cubic root of 32572540 is about 319.3624676743.

The spelling of 32572540 in words is "thirty-two million, five hundred seventy-two thousand, five hundred forty".