620815132 has 24 divisors (see below), whose sum is σ = 1254436064. Its totient is φ = 263319552.

The previous prime is 620815109. The next prime is 620815133. The reversal of 620815132 is 231518026.

It is a super-2 number, since 2×620815132² = 770822856240354848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 620815132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620815133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111573 + ... + 117004.

Almost surely, 2^620815132 is an apocalyptic number.

It is an amenable number.

620815132 is an abundant number, since it is smaller than the sum of its proper divisors (633620932).

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

620815132 is a wasteful number, since it uses less digits than its factorization.

620815132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228685 (or 228683 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 620815132 is about 24916.1620640098. The cubic root of 620815132 is about 853.0754253276.

The spelling of 620815132 in words is "six hundred twenty million, eight hundred fifteen thousand, one hundred thirty-two".