1390379645 has 16 divisors (see below), whose sum is σ = 1695435840. Its totient is φ = 1094358144.

The previous prime is 1390379633. The next prime is 1390379651. The reversal of 1390379645 is 5469730931.

It is a cyclic number.

It is not a de Polignac number, because 1390379645 - 2¹⁰ = 1390378621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1390379645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 339329 + ... + 343401.

It is an arithmetic number, because the mean of its divisors is an integer number (105964740).

Almost surely, 2^1390379645 is an apocalyptic number.

It is an amenable number.

1390379645 is a deficient number, since it is larger than the sum of its proper divisors (305056195).

1390379645 is a wasteful number, since it uses less digits than its factorization.

1390379645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5164.

The product of its (nonzero) digits is 612360, while the sum is 47.

The square root of 1390379645 is about 37287.7948530079. The cubic root of 1390379645 is about 1116.1206252391.

The spelling of 1390379645 in words is "one billion, three hundred ninety million, three hundred seventy-nine thousand, six hundred forty-five".