164240440 has 64 divisors (see below), whose sum is σ = 454829760. Its totient is φ = 51978240.

The previous prime is 164240431. The next prime is 164240441. The reversal of 164240440 is 44042461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164240441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18921 + ... + 26200.

It is an arithmetic number, because the mean of its divisors is an integer number (7106715).

Almost surely, 2^164240440 is an apocalyptic number.

164240440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164240440 is an abundant number, since it is smaller than the sum of its proper divisors (290589320).

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

164240440 is a wasteful number, since it uses less digits than its factorization.

164240440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45152 (or 45148 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 164240440 is about 12815.6326414266. The cubic root of 164240440 is about 547.6377363130.

The spelling of 164240440 in words is "one hundred sixty-four million, two hundred forty thousand, four hundred forty".