620155992 has 64 divisors (see below), whose sum is σ = 1670031360. Its totient is φ = 191347200.

The previous prime is 620155979. The next prime is 620155993. The reversal of 620155992 is 299551026.

620155992 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 620155992.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620155993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1009 + ... + 35232.

It is an arithmetic number, because the mean of its divisors is an integer number (26094240).

Almost surely, 2^620155992 is an apocalyptic number.

620155992 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 620155992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (835015680).

620155992 is an abundant number, since it is smaller than the sum of its proper divisors (1049875368).

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

620155992 is a wasteful number, since it uses less digits than its factorization.

620155992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36304 (or 36300 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 39.

The square root of 620155992 is about 24902.9313937135. The cubic root of 620155992 is about 852.7734055973.

The spelling of 620155992 in words is "six hundred twenty million, one hundred fifty-five thousand, nine hundred ninety-two".