1399137012 has 288 divisors, whose sum is σ = 4696473600. Its totient is φ = 341003520.

The previous prime is 1399137007. The next prime is 1399137017. The reversal of 1399137012 is 2107319931.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1399137007) and next prime (1399137017).

It is a super-3 number, since 3×1399137012³ (a number of 28 digits) contains 333 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399137017) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2335489 + ... + 2336087.

It is an arithmetic number, because the mean of its divisors is an integer number (16307200).

Almost surely, 2^1399137012 is an apocalyptic number.

1399137012 is a gapful number since it is divisible by the number (12) 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 1399137012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2348236800).

1399137012 is an abundant number, since it is smaller than the sum of its proper divisors (3297336588).

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

1399137012 is a wasteful number, since it uses less digits than its factorization.

1399137012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683 (or 678 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 36.

The square root of 1399137012 is about 37405.0399277958. The cubic root of 1399137012 is about 1118.4590340891.

The spelling of 1399137012 in words is "one billion, three hundred ninety-nine million, one hundred thirty-seven thousand, twelve".