619953144 has 64 divisors (see below), whose sum is σ = 1665619200. Its totient is φ = 191583744.

The previous prime is 619953121. The next prime is 619953149. The reversal of 619953144 is 441359916.

It is a junction number, because it is equal to n+sod(n) for n = 619953096 and 619953105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (619953149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15997 + ... + 38675.

It is an arithmetic number, because the mean of its divisors is an integer number (26025300).

Almost surely, 2^619953144 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 619953144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (832809600).

619953144 is an abundant number, since it is smaller than the sum of its proper divisors (1045666056).

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

619953144 is a wasteful number, since it uses less digits than its factorization.

619953144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22772 (or 22768 counting only the distinct ones).

The product of its digits is 116640, while the sum is 42.

The square root of 619953144 is about 24898.8582870781. The cubic root of 619953144 is about 852.6804170342.

The spelling of 619953144 in words is "six hundred nineteen million, nine hundred fifty-three thousand, one hundred forty-four".