1392686228 has 6 divisors (see below), whose sum is σ = 2437200906. Its totient is φ = 696343112.

The previous prime is 1392686203. The next prime is 1392686231. The reversal of 1392686228 is 8226862931.

It can be written as a sum of positive squares in only one way, i.e., 1266078724 + 126607504 = 35582^2 + 11252^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174085775 + ... + 174085782.

It is an arithmetic number, because the mean of its divisors is an integer number (406200151).

Almost surely, 2^1392686228 is an apocalyptic number.

It is an amenable number.

1392686228 is a deficient number, since it is larger than the sum of its proper divisors (1044514678).

1392686228 is a wasteful number, since it uses less digits than its factorization.

1392686228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348171561 (or 348171559 counting only the distinct ones).

The product of its digits is 497664, while the sum is 47.

The square root of 1392686228 is about 37318.7114997289. The cubic root of 1392686228 is about 1116.7374837492.

The spelling of 1392686228 in words is "one billion, three hundred ninety-two million, six hundred eighty-six thousand, two hundred twenty-eight".