164745440 has 48 divisors (see below), whose sum is σ = 390277440. Its totient is φ = 65717760.

The previous prime is 164745437. The next prime is 164745461. The reversal of 164745440 is 44547461.

It is a self number, because there is not a number n which added to its sum of digits gives 164745440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67766 + ... + 70154.

It is an arithmetic number, because the mean of its divisors is an integer number (8130780).

Almost surely, 2^164745440 is an apocalyptic number.

164745440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164745440 is an abundant number, since it is smaller than the sum of its proper divisors (225532000).

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

164745440 is a wasteful number, since it uses less digits than its factorization.

164745440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2835 (or 2827 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 35.

The square root of 164745440 is about 12835.3200193840. The cubic root of 164745440 is about 548.1984469621.

The spelling of 164745440 in words is "one hundred sixty-four million, seven hundred forty-five thousand, four hundred forty".