1392388 has 6 divisors (see below), whose sum is σ = 2436686. Its totient is φ = 696192.

The previous prime is 1392379. The next prime is 1392407. The reversal of 1392388 is 8832931.

It can be written as a sum of positive squares in only one way, i.e., 1295044 + 97344 = 1138^2 + 312^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174045 + ... + 174052.

2^1392388 is an apocalyptic number.

It is an amenable number.

1392388 is a deficient number, since it is larger than the sum of its proper divisors (1044298).

1392388 is a wasteful number, since it uses less digits than its factorization.

1392388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348101 (or 348099 counting only the distinct ones).

The product of its digits is 10368, while the sum is 34.

The square root of 1392388 is about 1179.9949152433. The cubic root of 1392388 is about 111.6657765826.

The spelling of 1392388 in words is "one million, three hundred ninety-two thousand, three hundred eighty-eight".