1399071370 has 64 divisors (see below), whose sum is σ = 2672787456. Its totient is φ = 526236480.

The previous prime is 1399071361. The next prime is 1399071379. The reversal of 1399071370 is 731709931.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1399071361) and next prime (1399071379).

It is not an unprimeable number, because it can be changed into a prime (1399071379) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6163197 + ... + 6163423.

It is an arithmetic number, because the mean of its divisors is an integer number (41762304).

Almost surely, 2^1399071370 is an apocalyptic number.

1399071370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1399071370 is a deficient number, since it is larger than the sum of its proper divisors (1273716086).

1399071370 is a wasteful number, since it uses less digits than its factorization.

1399071370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595.

The product of its (nonzero) digits is 35721, while the sum is 40.

The square root of 1399071370 is about 37404.1624689018. The cubic root of 1399071370 is about 1118.4415425841.

The spelling of 1399071370 in words is "one billion, three hundred ninety-nine million, seventy-one thousand, three hundred seventy".