1390690752 has 168 divisors, whose sum is σ = 4177076736. Its totient is φ = 407616000.

The previous prime is 1390690733. The next prime is 1390690789. The reversal of 1390690752 is 2570960931.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 719227 + ... + 721157.

It is an arithmetic number, because the mean of its divisors is an integer number (24863552).

Almost surely, 2^1390690752 is an apocalyptic number.

1390690752 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1390690752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2088538368).

1390690752 is an abundant number, since it is smaller than the sum of its proper divisors (2786385984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1390690752 is a wasteful number, since it uses less digits than its factorization.

1390690752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999 (or 1978 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 42.

The square root of 1390690752 is about 37291.9663198389. The cubic root of 1390690752 is about 1116.2038655841.

The spelling of 1390690752 in words is "one billion, three hundred ninety million, six hundred ninety thousand, seven hundred fifty-two".