1243432404 has 24 divisors (see below), whose sum is σ = 3223713920. Its totient is φ = 414477432.

The previous prime is 1243432387. The next prime is 1243432453. The reversal of 1243432404 is 4042343421.

It is a happy number.

It is a super-2 number, since 2×1243432404² = 3092248286634438432, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5756524 + ... + 5756739.

Almost surely, 2^1243432404 is an apocalyptic number.

It is an amenable number.

1243432404 is an abundant number, since it is smaller than the sum of its proper divisors (1980281516).

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

1243432404 is a wasteful number, since it uses less digits than its factorization.

1243432404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11513276 (or 11513268 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 1243432404 is about 35262.3369049755. The cubic root of 1243432404 is about 1075.3274370136.

Adding to 1243432404 its reverse (4042343421), we get a palindrome (5285775825).

The spelling of 1243432404 in words is "one billion, two hundred forty-three million, four hundred thirty-two thousand, four hundred four".