1390737240 has 96 divisors (see below), whose sum is σ = 4531971600. Its totient is φ = 369872640.

The previous prime is 1390737239. The next prime is 1390737259. The reversal of 1390737240 is 427370931.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1390737195 and 1390737204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135075 + ... + 145005.

Almost surely, 2^1390737240 is an apocalyptic number.

1390737240 is a gapful number since it is divisible by the number (10) 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 1390737240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2265985800).

1390737240 is an abundant number, since it is smaller than the sum of its proper divisors (3141234360).

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

1390737240 is a wasteful number, since it uses less digits than its factorization.

1390737240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10337 (or 10330 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 1390737240 is about 37292.5896124150. The cubic root of 1390737240 is about 1116.2163029303.

The spelling of 1390737240 in words is "one billion, three hundred ninety million, seven hundred thirty-seven thousand, two hundred forty".