1209642432 has 112 divisors (see below), whose sum is σ = 3349447200. Its totient is φ = 384778240.

The previous prime is 1209642409. The next prime is 1209642451. The reversal of 1209642432 is 2342469021.

It is a junction number, because it is equal to n+sod(n) for n = 1209642393 and 1209642402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 494332 + ... + 496772.

Almost surely, 2^1209642432 is an apocalyptic number.

1209642432 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 1209642432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1674723600).

1209642432 is an abundant number, since it is smaller than the sum of its proper divisors (2139804768).

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

1209642432 is a wasteful number, since it uses less digits than its factorization.

1209642432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2574 (or 2564 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 1209642432 is about 34779.9142034594. The cubic root of 1209642432 is about 1065.4972607889.

The spelling of 1209642432 in words is "one billion, two hundred nine million, six hundred forty-two thousand, four hundred thirty-two".