1229940432 has 120 divisors (see below), whose sum is σ = 4000726080. Its totient is φ = 345438720.

The previous prime is 1229940409. The next prime is 1229940443. The reversal of 1229940432 is 2340499221.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49132 + ... + 69812.

It is an arithmetic number, because the mean of its divisors is an integer number (33339384).

Almost surely, 2^1229940432 is an apocalyptic number.

1229940432 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 1229940432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2000363040).

1229940432 is an abundant number, since it is smaller than the sum of its proper divisors (2770785648).

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

1229940432 is a wasteful number, since it uses less digits than its factorization.

1229940432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20761 (or 20752 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 1229940432 is about 35070.5065831676. The cubic root of 1229940432 is about 1071.4239730393.

The spelling of 1229940432 in words is "one billion, two hundred twenty-nine million, nine hundred forty thousand, four hundred thirty-two".