32153440 has 48 divisors (see below), whose sum is σ = 82872720. Its totient is φ = 11691520.

The previous prime is 32153423. The next prime is 32153441. The reversal of 32153440 is 4435123.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32153441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7375 + ... + 10894.

It is an arithmetic number, because the mean of its divisors is an integer number (1726515).

Almost surely, 2^32153440 is an apocalyptic number.

It is an amenable number.

32153440 is an abundant number, since it is smaller than the sum of its proper divisors (50719280).

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

32153440 is a wasteful number, since it uses less digits than its factorization.

32153440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18295 (or 18287 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 32153440 is about 5670.4003386004. The cubic root of 32153440 is about 317.9868406933.

Adding to 32153440 its reverse (4435123), we get a palindrome (36588563).

The spelling of 32153440 in words is "thirty-two million, one hundred fifty-three thousand, four hundred forty".