621964 has 24 divisors (see below), whose sum is σ = 1262240. Its totient is φ = 262656.

The previous prime is 621941. The next prime is 621983. The reversal of 621964 is 469126.

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

It is a nialpdrome in base 15.

It is an unprimeable number.

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, 2602 + ... + 2830.

2⁶²¹⁹⁶⁴ is an apocalyptic number.

It is an amenable number.

621964 is an abundant number, since it is smaller than the sum of its proper divisors (640276).

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

621964 is a wasteful number, since it uses less digits than its factorization.

621964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337 (or 335 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

The square root of 621964 is about 788.6469425541. The cubic root of 621964 is about 85.3601329128.

The spelling of 621964 in words is "six hundred twenty-one thousand, nine hundred sixty-four".