1390764615 has 12 divisors (see below), whose sum is σ = 2225454504. Its totient is φ = 741664096.

The previous prime is 1390764589. The next prime is 1390764619. The reversal of 1390764615 is 5164670931.

It is not a de Polignac number, because 1390764615 - 2¹² = 1390760519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390764619) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 139621 + ... + 149249.

It is an arithmetic number, because the mean of its divisors is an integer number (185454542).

Almost surely, 2^1390764615 is an apocalyptic number.

1390764615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1390764615 is a deficient number, since it is larger than the sum of its proper divisors (834689889).

1390764615 is an frugal number, since it uses more digits than its factorization.

1390764615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19266 (or 9637 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 1390764615 is about 37292.9566406312. The cubic root of 1390764615 is about 1116.2236266768.

The spelling of 1390764615 in words is "one billion, three hundred ninety million, seven hundred sixty-four thousand, six hundred fifteen".