620520438 has 8 divisors (see below), whose sum is σ = 1241040888. Its totient is φ = 206840144.

The previous prime is 620520437. The next prime is 620520491. The reversal of 620520438 is 834025026.

It is a sphenic number, since it is the product of 3 distinct primes.

620520438 is an admirable number.

It is a super-2 number, since 2×620520438² = 770091227951423688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620520437) 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, 51710031 + ... + 51710042.

It is an arithmetic number, because the mean of its divisors is an integer number (155130111).

Almost surely, 2^620520438 is an apocalyptic number.

620520438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

620520438 is a wasteful number, since it uses less digits than its factorization.

620520438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103420078.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 620520438 is about 24910.2476503145. The cubic root of 620520438 is about 852.9404221759.

The spelling of 620520438 in words is "six hundred twenty million, five hundred twenty thousand, four hundred thirty-eight".