1399547730 has 32 divisors (see below), whose sum is σ = 3838760064. Its totient is φ = 319896576.

The previous prime is 1399547689. The next prime is 1399547741. The reversal of 1399547730 is 377459931.

It is a happy number.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1399547730.

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 15 ways as a sum of consecutive naturals, for example, 3332047 + ... + 3332466.

It is an arithmetic number, because the mean of its divisors is an integer number (119961252).

Almost surely, 2^1399547730 is an apocalyptic number.

1399547730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1399547730 is an abundant number, since it is smaller than the sum of its proper divisors (2439212334).

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

1399547730 is a wasteful number, since it uses less digits than its factorization.

1399547730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6664530.

The product of its (nonzero) digits is 714420, while the sum is 48.

The square root of 1399547730 is about 37410.5296674613. The cubic root of 1399547730 is about 1118.5684649528.

The spelling of 1399547730 in words is "one billion, three hundred ninety-nine million, five hundred forty-seven thousand, seven hundred thirty".