620643624 has 32 divisors (see below), whose sum is σ = 1593546720. Its totient is φ = 201289536.

The previous prime is 620643623. The next prime is 620643641. The reversal of 620643624 is 426346026.

It is not an unprimeable number, because it can be changed into a prime (620643623) 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, 348574 + ... + 350349.

It is an arithmetic number, because the mean of its divisors is an integer number (49798335).

Almost surely, 2^620643624 is an apocalyptic number.

It is an amenable number.

620643624 is an abundant number, since it is smaller than the sum of its proper divisors (972903096).

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

620643624 is a wasteful number, since it uses less digits than its factorization.

620643624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698969 (or 698965 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 33.

The square root of 620643624 is about 24912.7201244665. The cubic root of 620643624 is about 852.9968604817.

The spelling of 620643624 in words is "six hundred twenty million, six hundred forty-three thousand, six hundred twenty-four".