1994469564 has 48 divisors (see below), whose sum is σ = 4891638528. Its totient is φ = 631264128.

The previous prime is 1994469517. The next prime is 1994469593. The reversal of 1994469564 is 4659644991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11439 + ... + 64185.

It is an arithmetic number, because the mean of its divisors is an integer number (101909136).

Almost surely, 2^1994469564 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 1994469564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2445819264).

1994469564 is an abundant number, since it is smaller than the sum of its proper divisors (2897168964).

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

1994469564 is a wasteful number, since it uses less digits than its factorization.

1994469564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52914 (or 52912 counting only the distinct ones).

The product of its digits is 8398080, while the sum is 57.

The square root of 1994469564 is about 44659.4845917415. The cubic root of 1994469564 is about 1258.7586590256.

The spelling of 1994469564 in words is "one billion, nine hundred ninety-four million, four hundred sixty-nine thousand, five hundred sixty-four".