619920 has 160 divisors (see below), whose sum is σ = 2499840. Its totient is φ = 138240.

The previous prime is 619909. The next prime is 619921. The reversal of 619920 is 29916.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

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 619920.

It is not an unprimeable number, because it can be changed into a prime (619921) by changing a digit.

619920 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15100 + ... + 15140.

It is an arithmetic number, because the mean of its divisors is an integer number (15624).

2⁶¹⁹⁹²⁰ is an apocalyptic number.

619920 is a gapful number since it is divisible by the number (60) 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 619920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1249920).

619920 is an abundant number, since it is smaller than the sum of its proper divisors (1879920).

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

619920 is a wasteful number, since it uses less digits than its factorization.

619920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 619920 is about 787.3499857116. The cubic root of 619920 is about 85.2665221400.

The spelling of 619920 in words is "six hundred nineteen thousand, nine hundred twenty".