621992 has 32 divisors (see below), whose sum is σ = 1382400. Its totient is φ = 256704.

The previous prime is 621983. The next prime is 621997. The reversal of 621992 is 299126.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (621997) 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, 1433 + ... + 1815.

It is an arithmetic number, because the mean of its divisors is an integer number (43200).

2⁶²¹⁹⁹² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 621992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (691200).

621992 is an abundant number, since it is smaller than the sum of its proper divisors (760408).

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

621992 is a wasteful number, since it uses less digits than its factorization.

621992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425 (or 421 counting only the distinct ones).

The product of its digits is 1944, while the sum is 29.

The square root of 621992 is about 788.6646942776. The cubic root of 621992 is about 85.3614138272.

The spelling of 621992 in words is "six hundred twenty-one thousand, nine hundred ninety-two".