1390669064 has 8 divisors (see below), whose sum is σ = 2607504510. Its totient is φ = 695334528.

The previous prime is 1390669039. The next prime is 1390669069. The reversal of 1390669064 is 4609660931.

It can be written as a sum of positive squares in only one way, i.e., 1096272100 + 294396964 = 33110^2 + 17158^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1390669069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86916809 + ... + 86916824.

Almost surely, 2^1390669064 is an apocalyptic number.

It is an amenable number.

1390669064 is a deficient number, since it is larger than the sum of its proper divisors (1216835446).

1390669064 is a wasteful number, since it uses less digits than its factorization.

1390669064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173833639 (or 173833635 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 1390669064 is about 37291.6755322150. The cubic root of 1390669064 is about 1116.1980631066.

The spelling of 1390669064 in words is "one billion, three hundred ninety million, six hundred sixty-nine thousand, sixty-four".