1392490706 has 8 divisors (see below), whose sum is σ = 2211602940. Its totient is φ = 655289728.

The previous prime is 1392490609. The next prime is 1392490727. The reversal of 1392490706 is 6070942931.

It can be written as a sum of positive squares in 2 ways, for example, as 1190595025 + 201895681 = 34505^2 + 14209^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20477771 + ... + 20477838.

Almost surely, 2^1392490706 is an apocalyptic number.

1392490706 is a deficient number, since it is larger than the sum of its proper divisors (819112234).

1392490706 is a wasteful number, since it uses less digits than its factorization.

1392490706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40955628.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 1392490706 is about 37316.0917835724. The cubic root of 1392490706 is about 1116.6852209684.

The spelling of 1392490706 in words is "one billion, three hundred ninety-two million, four hundred ninety thousand, seven hundred six".