1392728 has 8 divisors (see below), whose sum is σ = 2611380. Its totient is φ = 696360.

The previous prime is 1392707. The next prime is 1392731. The reversal of 1392728 is 8272931.

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 1392694 and 1392703.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 87038 + ... + 87053.

2^1392728 is an apocalyptic number.

It is an amenable number.

1392728 is a deficient number, since it is larger than the sum of its proper divisors (1218652).

1392728 is a wasteful number, since it uses less digits than its factorization.

1392728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174097 (or 174093 counting only the distinct ones).

The product of its digits is 6048, while the sum is 32.

The square root of 1392728 is about 1180.1389748669. The cubic root of 1392728 is about 111.6748648717.

The spelling of 1392728 in words is "one million, three hundred ninety-two thousand, seven hundred twenty-eight".