1299438436 has 12 divisors (see below), whose sum is σ = 2284796080. Its totient is φ = 646639560.

The previous prime is 1299438407. The next prime is 1299438487. The reversal of 1299438436 is 6348349921.

It is a self number, because there is not a number n which added to its sum of digits gives 1299438436.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 768966 + ... + 770653.

Almost surely, 2^1299438436 is an apocalyptic number.

It is an amenable number.

1299438436 is a deficient number, since it is larger than the sum of its proper divisors (985357644).

1299438436 is a wasteful number, since it uses less digits than its factorization.

1299438436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539834 (or 1539832 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 49.

The square root of 1299438436 is about 36047.7244219382. The cubic root of 1299438436 is about 1091.2357099267.

The spelling of 1299438436 in words is "one billion, two hundred ninety-nine million, four hundred thirty-eight thousand, four hundred thirty-six".