619604820 has 144 divisors (see below), whose sum is σ = 2064666240. Its totient is φ = 149707008.

The previous prime is 619604809. The next prime is 619604837. The reversal of 619604820 is 28406916.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 74722 + ... + 82598.

It is an arithmetic number, because the mean of its divisors is an integer number (14337960).

Almost surely, 2^619604820 is an apocalyptic number.

619604820 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 619604820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1032333120).

619604820 is an abundant number, since it is smaller than the sum of its proper divisors (1445061420).

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

619604820 is a wasteful number, since it uses less digits than its factorization.

619604820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7934 (or 7929 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 619604820 is about 24891.8625257332. The cubic root of 619604820 is about 852.5206927609.

The spelling of 619604820 in words is "six hundred nineteen million, six hundred four thousand, eight hundred twenty".