1390249752 has 32 divisors (see below), whose sum is σ = 3498650880. Its totient is φ = 460346400.

The previous prime is 1390249747. The next prime is 1390249753. The reversal of 1390249752 is 2579420931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390249753) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188188 + ... + 195435.

It is an arithmetic number, because the mean of its divisors is an integer number (109332840).

Almost surely, 2^1390249752 is an apocalyptic number.

1390249752 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1390249752 is an abundant number, since it is smaller than the sum of its proper divisors (2108401128).

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

1390249752 is a wasteful number, since it uses less digits than its factorization.

1390249752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383783 (or 383779 counting only the distinct ones).

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

The square root of 1390249752 is about 37286.0530493642. The cubic root of 1390249752 is about 1116.0858671614.

The spelling of 1390249752 in words is "one billion, three hundred ninety million, two hundred forty-nine thousand, seven hundred fifty-two".