642604020 has 48 divisors (see below), whose sum is σ = 1801033920. Its totient is φ = 171195136.

The previous prime is 642604019. The next prime is 642604033. The reversal of 642604020 is 20406246.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65176 + ... + 74384.

It is an arithmetic number, because the mean of its divisors is an integer number (37521540).

Almost surely, 2^642604020 is an apocalyptic number.

642604020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

642604020 is an abundant number, since it is smaller than the sum of its proper divisors (1158429900).

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

642604020 is a wasteful number, since it uses less digits than its factorization.

642604020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10384 (or 10382 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 642604020 is about 25349.6355003381. The cubic root of 642604020 is about 862.9410841991.

The spelling of 642604020 in words is "six hundred forty-two million, six hundred four thousand, twenty".