619894464 has 112 divisors (see below), whose sum is σ = 1897367808. Its totient is φ = 174947328.

The previous prime is 619894463. The next prime is 619894487. The reversal of 619894464 is 464498916.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (619894463) 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, 108774 + ... + 114330.

It is an arithmetic number, because the mean of its divisors is an integer number (16940784).

Almost surely, 2^619894464 is an apocalyptic number.

619894464 is a gapful number since it is divisible by the number (64) 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 619894464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (948683904).

619894464 is an abundant number, since it is smaller than the sum of its proper divisors (1277473344).

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

619894464 is a wasteful number, since it uses less digits than its factorization.

619894464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5662 (or 5652 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 51.

The square root of 619894464 is about 24897.6798919096. The cubic root of 619894464 is about 852.6535134604.

The spelling of 619894464 in words is "six hundred nineteen million, eight hundred ninety-four thousand, four hundred sixty-four".