1392878404 has 24 divisors (see below), whose sum is σ = 2499856128. Its totient is φ = 678672960.

The previous prime is 1392878401. The next prime is 1392878447. The reversal of 1392878404 is 4048782931.

It is a super-2 number, since 2×1392878404² = 3880220496659174432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1392878401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154197 + ... + 162979.

It is an arithmetic number, because the mean of its divisors is an integer number (104160672).

Almost surely, 2^1392878404 is an apocalyptic number.

It is an amenable number.

1392878404 is a deficient number, since it is larger than the sum of its proper divisors (1106977724).

1392878404 is a wasteful number, since it uses less digits than its factorization.

1392878404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9795 (or 9793 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 1392878404 is about 37321.2862050600. The cubic root of 1392878404 is about 1116.7888473820.

The spelling of 1392878404 in words is "one billion, three hundred ninety-two million, eight hundred seventy-eight thousand, four hundred four".