1392166690 has 8 divisors (see below), whose sum is σ = 2505900060. Its totient is φ = 556866672.

The previous prime is 1392166679. The next prime is 1392166709. The reversal of 1392166690 is 966612931.

It can be written as a sum of positive squares in 2 ways, for example, as 1391961481 + 205209 = 37309^2 + 453^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1392166690² = 3876256185491112200, which contains 22 as substring.

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, 69608325 + ... + 69608344.

Almost surely, 2^1392166690 is an apocalyptic number.

1392166690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1392166690 is a deficient number, since it is larger than the sum of its proper divisors (1113733370).

1392166690 is a wasteful number, since it uses less digits than its factorization.

1392166690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139216676.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 1392166690 is about 37311.7500259637. The cubic root of 1392166690 is about 1116.5986011333.

The spelling of 1392166690 in words is "one billion, three hundred ninety-two million, one hundred sixty-six thousand, six hundred ninety".