1392428 has 12 divisors (see below), whose sum is σ = 2456832. Its totient is φ = 690480.

The previous prime is 1392407. The next prime is 1392431. The reversal of 1392428 is 8242931.

It is a self number, because there is not a number n which added to its sum of digits gives 1392428.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 863 + ... + 1878.

It is an arithmetic number, because the mean of its divisors is an integer number (204736).

2^1392428 is an apocalyptic number.

It is an amenable number.

1392428 is a deficient number, since it is larger than the sum of its proper divisors (1064404).

1392428 is a wasteful number, since it uses less digits than its factorization.

1392428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2872 (or 2870 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 1392428 is about 1180.0118643471. The cubic root of 1392428 is about 111.6668458699. Note that the first 3 decimals are identical.

The spelling of 1392428 in words is "one million, three hundred ninety-two thousand, four hundred twenty-eight".