620136156 has 12 divisors (see below), whose sum is σ = 1446984392. Its totient is φ = 206712048.

The previous prime is 620136151. The next prime is 620136157. The reversal of 620136156 is 651631026.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620136151) 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, 25838995 + ... + 25839018.

Almost surely, 2^620136156 is an apocalyptic number.

It is an amenable number.

620136156 is an abundant number, since it is smaller than the sum of its proper divisors (826848236).

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

620136156 is a wasteful number, since it uses less digits than its factorization.

620136156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51678020 (or 51678018 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 620136156 is about 24902.5331241623. The cubic root of 620136156 is about 852.7643133722.

The spelling of 620136156 in words is "six hundred twenty million, one hundred thirty-six thousand, one hundred fifty-six".