620643156 has 48 divisors (see below), whose sum is σ = 1656998784. Its totient is φ = 177117696.

The previous prime is 620643077. The next prime is 620643167. The reversal of 620643156 is 651346026.

620643156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76176 + ... + 83928.

It is an arithmetic number, because the mean of its divisors is an integer number (34520808).

Almost surely, 2^620643156 is an apocalyptic number.

It is an amenable number.

620643156 is an abundant number, since it is smaller than the sum of its proper divisors (1036355628).

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

620643156 is a wasteful number, since it uses less digits than its factorization.

620643156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8720 (or 8718 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 620643156 is about 24912.7107316727. The cubic root of 620643156 is about 852.9966460792.

The spelling of 620643156 in words is "six hundred twenty million, six hundred forty-three thousand, one hundred fifty-six".