165624020 has 12 divisors (see below), whose sum is σ = 347810484. Its totient is φ = 66249600.

The previous prime is 165624001. The next prime is 165624023. The reversal of 165624020 is 20426561.

It can be written as a sum of positive squares in 2 ways, for example, as 97693456 + 67930564 = 9884^2 + 8242^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165624023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4140581 + ... + 4140620.

It is an arithmetic number, because the mean of its divisors is an integer number (28984207).

Almost surely, 2^165624020 is an apocalyptic number.

165624020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165624020 is an abundant number, since it is smaller than the sum of its proper divisors (182186464).

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

165624020 is a wasteful number, since it uses less digits than its factorization.

165624020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8281210 (or 8281208 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 165624020 is about 12869.4996017716. The cubic root of 165624020 is about 549.1712256074.

The spelling of 165624020 in words is "one hundred sixty-five million, six hundred twenty-four thousand, twenty".