1390529488 has 20 divisors (see below), whose sum is σ = 2708116228. Its totient is φ = 691660800.

The previous prime is 1390529479. The next prime is 1390529489. The reversal of 1390529488 is 8849250931.

It can be written as a sum of positive squares in 2 ways, for example, as 90782784 + 1299746704 = 9528^2 + 36052^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390529489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222063 + ... + 228238.

Almost surely, 2^1390529488 is an apocalyptic number.

It is an amenable number.

1390529488 is a deficient number, since it is larger than the sum of its proper divisors (1317586740).

1390529488 is a wasteful number, since it uses less digits than its factorization.

1390529488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450502 (or 450496 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 49.

The square root of 1390529488 is about 37289.8040756451. The cubic root of 1390529488 is about 1116.1607190499.

The spelling of 1390529488 in words is "one billion, three hundred ninety million, five hundred twenty-nine thousand, four hundred eighty-eight".