1298390860 has 24 divisors (see below), whose sum is σ = 2936361456. Its totient is φ = 479405760.

The previous prime is 1298390843. The next prime is 1298390867. The reversal of 1298390860 is 680938921.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1298390860.

It is not an unprimeable number, because it can be changed into a prime (1298390867) 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, 2496646 + ... + 2497165.

It is an arithmetic number, because the mean of its divisors is an integer number (122348394).

Almost surely, 2^1298390860 is an apocalyptic number.

1298390860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1298390860 is an abundant number, since it is smaller than the sum of its proper divisors (1637970596).

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

1298390860 is a wasteful number, since it uses less digits than its factorization.

1298390860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4993833 (or 4993831 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 1298390860 is about 36033.1910882175. The cubic root of 1298390860 is about 1090.9423884323.

The spelling of 1298390860 in words is "one billion, two hundred ninety-eight million, three hundred ninety thousand, eight hundred sixty".