819979452 has 36 divisors (see below), whose sum is σ = 2076068176. Its totient is φ = 272885760.

The previous prime is 819979451. The next prime is 819979453. The reversal of 819979452 is 254979918.

It is an interprime number because it is at equal distance from previous prime (819979451) and next prime (819979453).

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (819979451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4668 + ... + 40764.

Almost surely, 2^819979452 is an apocalyptic number.

It is an amenable number.

819979452 is an abundant number, since it is smaller than the sum of its proper divisors (1256088724).

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

819979452 is a wasteful number, since it uses less digits than its factorization.

819979452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36738 (or 36733 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 54.

The square root of 819979452 is about 28635.2833406621. The cubic root of 819979452 is about 935.9823440676.

The spelling of 819979452 in words is "eight hundred nineteen million, nine hundred seventy-nine thousand, four hundred fifty-two".