1390745277 has 12 divisors (see below), whose sum is σ = 2009313280. Its totient is φ = 926951688.

The previous prime is 1390745273. The next prime is 1390745311. The reversal of 1390745277 is 7725470931.

It is not a de Polignac number, because 1390745277 - 2² = 1390745273 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390745273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30978 + ... + 61164.

Almost surely, 2^1390745277 is an apocalyptic number.

It is an amenable number.

1390745277 is a deficient number, since it is larger than the sum of its proper divisors (618568003).

1390745277 is a wasteful number, since it uses less digits than its factorization.

1390745277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35312 (or 35309 counting only the distinct ones).

The product of its (nonzero) digits is 370440, while the sum is 45.

The square root of 1390745277 is about 37292.6973682516. The cubic root of 1390745277 is about 1116.2184531120.

The spelling of 1390745277 in words is "one billion, three hundred ninety million, seven hundred forty-five thousand, two hundred seventy-seven".