1399770432 has 336 divisors, whose sum is σ = 4526645760. Its totient is φ = 411485184.

The previous prime is 1399770391. The next prime is 1399770433. The reversal of 1399770432 is 2340779931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399770433) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16864663 + ... + 16864745.

It is an arithmetic number, because the mean of its divisors is an integer number (13472160).

Almost surely, 2^1399770432 is an apocalyptic number.

1399770432 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 1399770432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2263322880).

1399770432 is an abundant number, since it is smaller than the sum of its proper divisors (3126875328).

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

1399770432 is a wasteful number, since it uses less digits than its factorization.

1399770432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 45.

The square root of 1399770432 is about 37413.5060105305. The cubic root of 1399770432 is about 1118.6277922667.

The spelling of 1399770432 in words is "one billion, three hundred ninety-nine million, seven hundred seventy thousand, four hundred thirty-two".