1299045888 has 480 divisors, whose sum is σ = 4779979776. Its totient is φ = 330891264.

The previous prime is 1299045887. The next prime is 1299045899. The reversal of 1299045888 is 8885409921.

1299045888 is a `hidden beast` number, since 1 + 29 + 90 + 458 + 88 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299045887) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12612045 + ... + 12612147.

Almost surely, 2^1299045888 is an apocalyptic number.

1299045888 is a gapful number since it is divisible by the number (18) 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 1299045888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2389989888).

1299045888 is an abundant number, since it is smaller than the sum of its proper divisors (3480933888).

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

1299045888 is a wasteful number, since it uses less digits than its factorization.

1299045888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 54.

The square root of 1299045888 is about 36042.2791732154. The cubic root of 1299045888 is about 1091.1258148814.

The spelling of 1299045888 in words is "one billion, two hundred ninety-nine million, forty-five thousand, eight hundred eighty-eight".