1380257740 has 24 divisors (see below), whose sum is σ = 2900498832. Its totient is φ = 551730240.

The previous prime is 1380257737. The next prime is 1380257759. The reversal of 1380257740 is 477520831.

It is a super-2 number, since 2×1380257740² = 3810222857659815200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1380257740.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8082 + ... + 53158.

It is an arithmetic number, because the mean of its divisors is an integer number (120854118).

Almost surely, 2^1380257740 is an apocalyptic number.

1380257740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1380257740 is an abundant number, since it is smaller than the sum of its proper divisors (1520241092).

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

1380257740 is a wasteful number, since it uses less digits than its factorization.

1380257740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46617 (or 46615 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 1380257740 is about 37151.8201438368. The cubic root of 1380257740 is about 1113.4055891129.

The spelling of 1380257740 in words is "one billion, three hundred eighty million, two hundred fifty-seven thousand, seven hundred forty".