1299889938 has 16 divisors (see below), whose sum is σ = 2752708320. Its totient is φ = 407808576.

The previous prime is 1299889909. The next prime is 1299889961. The reversal of 1299889938 is 8399889921.

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, 6371908 + ... + 6372111.

It is an arithmetic number, because the mean of its divisors is an integer number (172044270).

Almost surely, 2^1299889938 is an apocalyptic number.

1299889938 is an abundant number, since it is smaller than the sum of its proper divisors (1452818382).

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

1299889938 is a wasteful number, since it uses less digits than its factorization.

1299889938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12744041.

The product of its digits is 20155392, while the sum is 66.

The square root of 1299889938 is about 36053.9864370086. The cubic root of 1299889938 is about 1091.3620819653.

The spelling of 1299889938 in words is "one billion, two hundred ninety-nine million, eight hundred eighty-nine thousand, nine hundred thirty-eight".