620813868 has 12 divisors (see below), whose sum is σ = 1448565720. Its totient is φ = 206937952.

The previous prime is 620813863. The next prime is 620813873. The reversal of 620813868 is 868318026.

It is an interprime number because it is at equal distance from previous prime (620813863) and next prime (620813873).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×620813868² = 770819717402242848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (620813863) 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, 25867233 + ... + 25867256.

It is an arithmetic number, because the mean of its divisors is an integer number (120713810).

Almost surely, 2^620813868 is an apocalyptic number.

It is an amenable number.

620813868 is an abundant number, since it is smaller than the sum of its proper divisors (827751852).

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

620813868 is a wasteful number, since it uses less digits than its factorization.

620813868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51734496 (or 51734494 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 620813868 is about 24916.1366989347. The cubic root of 620813868 is about 853.0748463640.

The spelling of 620813868 in words is "six hundred twenty million, eight hundred thirteen thousand, eight hundred sixty-eight".