1298798280 has 128 divisors (see below), whose sum is σ = 4662403200. Its totient is φ = 319700736.

The previous prime is 1298798279. The next prime is 1298798299. The reversal of 1298798280 is 828978921.

1298798280 is a `hidden beast` number, since 1 + 298 + 79 + 8 + 280 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32214 + ... + 60293.

It is an arithmetic number, because the mean of its divisors is an integer number (36425025).

Almost surely, 2^1298798280 is an apocalyptic number.

1298798280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1298798280 is an abundant number, since it is smaller than the sum of its proper divisors (3363604920).

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

1298798280 is a wasteful number, since it uses less digits than its factorization.

1298798280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92540 (or 92530 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 54.

The square root of 1298798280 is about 36038.8440436149. The cubic root of 1298798280 is about 1091.0564848573.

The spelling of 1298798280 in words is "one billion, two hundred ninety-eight million, seven hundred ninety-eight thousand, two hundred eighty".