620645396 has 12 divisors (see below), whose sum is σ = 1241290848. Its totient is φ = 265990872.

The previous prime is 620645383. The next prime is 620645471. The reversal of 620645396 is 693546026.

620645396 is an admirable number.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11082926 + ... + 11082981.

It is an arithmetic number, because the mean of its divisors is an integer number (103440904).

Almost surely, 2^620645396 is an apocalyptic number.

It is an amenable number.

620645396 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

620645396 is a wasteful number, since it uses less digits than its factorization.

620645396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22165918 (or 22165916 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 41.

The square root of 620645396 is about 24912.7556886026. The cubic root of 620645396 is about 852.9976722783.

The spelling of 620645396 in words is "six hundred twenty million, six hundred forty-five thousand, three hundred ninety-six".