1392724690 has 32 divisors (see below), whose sum is σ = 2867307264. Its totient is φ = 477126720.

The previous prime is 1392724679. The next prime is 1392724703. The reversal of 1392724690 is 964272931.

It is a super-2 number, since 2×1392724690² = 3879364124271192200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89467 + ... + 103873.

It is an arithmetic number, because the mean of its divisors is an integer number (89603352).

Almost surely, 2^1392724690 is an apocalyptic number.

1392724690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1392724690 is an abundant number, since it is smaller than the sum of its proper divisors (1474582574).

1392724690 is a wasteful number, since it uses less digits than its factorization.

1392724690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15802.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 1392724690 is about 37319.2268140700. The cubic root of 1392724690 is about 1116.7477640169.

The spelling of 1392724690 in words is "one billion, three hundred ninety-two million, seven hundred twenty-four thousand, six hundred ninety".