1390935646 has 8 divisors (see below), whose sum is σ = 2088064440. Its totient is φ = 694914168.

The previous prime is 1390935643. The next prime is 1390935659. The reversal of 1390935646 is 6465390931.

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

It is a junction number, because it is equal to n+sod(n) for n = 1390935596 and 1390935605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390935643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273681 + ... + 278716.

It is an arithmetic number, because the mean of its divisors is an integer number (261008055).

Almost surely, 2^1390935646 is an apocalyptic number.

1390935646 is a deficient number, since it is larger than the sum of its proper divisors (697128794).

1390935646 is a wasteful number, since it uses less digits than its factorization.

1390935646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553658.

The product of its (nonzero) digits is 524880, while the sum is 46.

The square root of 1390935646 is about 37295.2496438890. The cubic root of 1390935646 is about 1116.2693811286.

The spelling of 1390935646 in words is "one billion, three hundred ninety million, nine hundred thirty-five thousand, six hundred forty-six".