1390002765 has 16 divisors (see below), whose sum is σ = 2225216448. Its totient is φ = 740930816.

The previous prime is 1390002763. The next prime is 1390002781. The reversal of 1390002765 is 5672000931.

It is a cyclic number.

It is not a de Polignac number, because 1390002765 - 2¹ = 1390002763 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390002763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4309 + ... + 52901.

It is an arithmetic number, because the mean of its divisors is an integer number (139076028).

Almost surely, 2^1390002765 is an apocalyptic number.

1390002765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1390002765 is a deficient number, since it is larger than the sum of its proper divisors (835213683).

1390002765 is a wasteful number, since it uses less digits than its factorization.

1390002765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50508.

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 1390002765 is about 37282.7408461342. The cubic root of 1390002765 is about 1116.0197699187.

The spelling of 1390002765 in words is "one billion, three hundred ninety million, two thousand, seven hundred sixty-five".