1304885988 has 72 divisors (see below), whose sum is σ = 3806345088. Its totient is φ = 369197568.

The previous prime is 1304885951. The next prime is 1304886013. The reversal of 1304885988 is 8895884031.

1304885988 is a `hidden beast` number, since 1 + 3 + 0 + 48 + 8 + 598 + 8 = 666.

It is a super-2 number, since 2×1304885988² = 3405454883357472288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 820 + ... + 51092.

It is an arithmetic number, because the mean of its divisors is an integer number (52865904).

Almost surely, 2^1304885988 is an apocalyptic number.

1304885988 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 1304885988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1903172544).

1304885988 is an abundant number, since it is smaller than the sum of its proper divisors (2501459100).

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

1304885988 is a wasteful number, since it uses less digits than its factorization.

1304885988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50393 (or 50388 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 54.

The square root of 1304885988 is about 36123.2056717008. The cubic root of 1304885988 is about 1092.7584896649.

The spelling of 1304885988 in words is "one billion, three hundred four million, eight hundred eighty-five thousand, nine hundred eighty-eight".