1399599432 has 512 divisors, whose sum is σ = 5271552000. Its totient is φ = 333123840.

The previous prime is 1399599431. The next prime is 1399599449. The reversal of 1399599432 is 2349959931.

1399599432 is a `hidden beast` number, since 1 + 3 + 9 + 9 + 599 + 43 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1399599431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 13588293 + ... + 13588395.

It is an arithmetic number, because the mean of its divisors is an integer number (10296000).

Almost surely, 2^1399599432 is an apocalyptic number.

1399599432 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 1399599432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2635776000).

1399599432 is an abundant number, since it is smaller than the sum of its proper divisors (3871952568).

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

1399599432 is a wasteful number, since it uses less digits than its factorization.

1399599432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198 (or 188 counting only the distinct ones).

The product of its digits is 2361960, while the sum is 54.

The square root of 1399599432 is about 37411.2206697402. The cubic root of 1399599432 is about 1118.5822388107.

The spelling of 1399599432 in words is "one billion, three hundred ninety-nine million, five hundred ninety-nine thousand, four hundred thirty-two".