1299908678 has 16 divisors (see below), whose sum is σ = 2013935616. Its totient is φ = 628621320.

The previous prime is 1299908671. The next prime is 1299908699. The reversal of 1299908678 is 8768099921.

It is a super-2 number, since 2×1299908678² = 3379525142279415368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299908671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122825 + ... + 132987.

It is an arithmetic number, because the mean of its divisors is an integer number (125870976).

Almost surely, 2^1299908678 is an apocalyptic number.

1299908678 is a deficient number, since it is larger than the sum of its proper divisors (714026938).

1299908678 is a wasteful number, since it uses less digits than its factorization.

1299908678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12259.

The product of its (nonzero) digits is 3919104, while the sum is 59.

The square root of 1299908678 is about 36054.2463241156. The cubic root of 1299908678 is about 1091.3673265189.

The spelling of 1299908678 in words is "one billion, two hundred ninety-nine million, nine hundred eight thousand, six hundred seventy-eight".