620644086 has 32 divisors (see below), whose sum is σ = 1398643200. Its totient is φ = 203966280.

The previous prime is 620644067. The next prime is 620644093. The reversal of 620644086 is 680446026.

It is a happy number.

620644086 is a `hidden beast` number, since 6 + 2 + 0 + 644 + 0 + 8 + 6 = 666.

It is a zygodrome in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 620644086.

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, 77106 + ... + 84773.

It is an arithmetic number, because the mean of its divisors is an integer number (43707600).

Almost surely, 2^620644086 is an apocalyptic number.

620644086 is an abundant number, since it is smaller than the sum of its proper divisors (777999114).

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

620644086 is a wasteful number, since it uses less digits than its factorization.

620644086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161961 (or 161955 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 620644086 is about 24912.7293968365. The cubic root of 620644086 is about 852.9970721354.

The spelling of 620644086 in words is "six hundred twenty million, six hundred forty-four thousand, eighty-six".