619956 has 36 divisors (see below), whose sum is σ = 1660932. Its totient is φ = 194304.

The previous prime is 619921. The next prime is 619967. The reversal of 619956 is 659916.

It can be written as a sum of positive squares in 2 ways, for example, as 176400 + 443556 = 420^2 + 666^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 619956.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 619956.

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 11 ways as a sum of consecutive naturals, for example, 106 + ... + 1118.

It is an arithmetic number, because the mean of its divisors is an integer number (46137).

2⁶¹⁹⁹⁵⁶ 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 619956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (830466).

619956 is an abundant number, since it is smaller than the sum of its proper divisors (1040976).

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

619956 is a wasteful number, since it uses less digits than its factorization.

619956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040 (or 1035 counting only the distinct ones).

The product of its digits is 14580, while the sum is 36.

The square root of 619956 is about 787.3728468775. The cubic root of 619956 is about 85.2681726408.

It can be divided in two parts, 61995 and 6, that added together give a square (62001 = 249²).

The spelling of 619956 in words is "six hundred nineteen thousand, nine hundred fifty-six".