620634885 has 16 divisors (see below), whose sum is σ = 1069401984. Its totient is φ = 305543232.

The previous prime is 620634863. The next prime is 620634913. The reversal of 620634885 is 588436026.

It is not a de Polignac number, because 620634885 - 2⁵ = 620634853 is a prime.

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, 1591177 + ... + 1591566.

It is an arithmetic number, because the mean of its divisors is an integer number (66837624).

Almost surely, 2^620634885 is an apocalyptic number.

620634885 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

620634885 is a deficient number, since it is larger than the sum of its proper divisors (448767099).

620634885 is a wasteful number, since it uses less digits than its factorization.

620634885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3182764.

The product of its (nonzero) digits is 276480, while the sum is 42.

The square root of 620634885 is about 24912.5447315203. The cubic root of 620634885 is about 852.9928569096.

The spelling of 620634885 in words is "six hundred twenty million, six hundred thirty-four thousand, eight hundred eighty-five".