620643464 has 32 divisors (see below), whose sum is σ = 1333937280. Its totient is φ = 265192704.

The previous prime is 620643461. The next prime is 620643473. The reversal of 620643464 is 464346026.

It is not an unprimeable number, because it can be changed into a prime (620643461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2429 + ... + 35315.

It is an arithmetic number, because the mean of its divisors is an integer number (41685540).

Almost surely, 2^620643464 is an apocalyptic number.

It is an amenable number.

620643464 is an abundant number, since it is smaller than the sum of its proper divisors (713293816).

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

620643464 is a wasteful number, since it uses less digits than its factorization.

620643464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33237 (or 33233 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 35.

The square root of 620643464 is about 24912.7169132554. The cubic root of 620643464 is about 852.9967871818.

The spelling of 620643464 in words is "six hundred twenty million, six hundred forty-three thousand, four hundred sixty-four".