1304020392 has 16 divisors (see below), whose sum is σ = 3260051040. Its totient is φ = 434673456.

The previous prime is 1304020391. The next prime is 1304020423. The reversal of 1304020392 is 2930204031.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 54334183 = 1304020392 / (1 + 3 + 0 + 4 + 0 + 2 + 0 + 3 + 9 + 2).

It is not an unprimeable number, because it can be changed into a prime (1304020391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27167068 + ... + 27167115.

It is an arithmetic number, because the mean of its divisors is an integer number (203753190).

Almost surely, 2^1304020392 is an apocalyptic number.

1304020392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1304020392 is an abundant number, since it is smaller than the sum of its proper divisors (1956030648).

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

1304020392 is a wasteful number, since it uses less digits than its factorization.

1304020392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54334192 (or 54334188 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 1304020392 is about 36111.2225215375. Note that the first 3 decimals coincide. The cubic root of 1304020392 is about 1092.5168091363.

The spelling of 1304020392 in words is "one billion, three hundred four million, twenty thousand, three hundred ninety-two".