1298989626 has 16 divisors (see below), whose sum is σ = 2834159328. Its totient is φ = 393633200.

The previous prime is 1298989589. The next prime is 1298989633. The reversal of 1298989626 is 6269898921.

It is a self number, because there is not a number n which added to its sum of digits gives 1298989626.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9840765 + ... + 9840896.

It is an arithmetic number, because the mean of its divisors is an integer number (177134958).

Almost surely, 2^1298989626 is an apocalyptic number.

1298989626 is an abundant number, since it is smaller than the sum of its proper divisors (1535169702).

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

1298989626 is a wasteful number, since it uses less digits than its factorization.

1298989626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19681677.

The product of its digits is 6718464, while the sum is 60.

The square root of 1298989626 is about 36041.4986647337. The cubic root of 1298989626 is about 1091.1100623440.

The spelling of 1298989626 in words is "one billion, two hundred ninety-eight million, nine hundred eighty-nine thousand, six hundred twenty-six".