1399622136 has 128 divisors (see below), whose sum is σ = 3938457600. Its totient is φ = 410820480.

The previous prime is 1399622129. The next prime is 1399622141. The reversal of 1399622136 is 6312269931.

It is a happy number.

1399622136 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1577485 + ... + 1578371.

It is an arithmetic number, because the mean of its divisors is an integer number (30769200).

Almost surely, 2^1399622136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1399622136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1969228800).

1399622136 is an abundant number, since it is smaller than the sum of its proper divisors (2538835464).

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

1399622136 is a wasteful number, since it uses less digits than its factorization.

1399622136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089 (or 1085 counting only the distinct ones).

The product of its digits is 104976, while the sum is 42.

The square root of 1399622136 is about 37411.5241068845. The cubic root of 1399622136 is about 1118.5882872446.

The spelling of 1399622136 in words is "one billion, three hundred ninety-nine million, six hundred twenty-two thousand, one hundred thirty-six".