2398681690 has 16 divisors (see below), whose sum is σ = 4318485192. Its totient is φ = 959281984.

The previous prime is 2398681667. The next prime is 2398681709. The reversal of 2398681690 is 961868932.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2036807161 + 361874529 = 45131^2 + 19023^2 .

It is a super-2 number, since 2×2398681690² = 11507347699882512200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36192 + ... + 78148.

Almost surely, 2^2398681690 is an apocalyptic number.

2398681690 is a deficient number, since it is larger than the sum of its proper divisors (1919803502).

2398681690 is a wasteful number, since it uses less digits than its factorization.

2398681690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47681.

The product of its (nonzero) digits is 1119744, while the sum is 52.

The square root of 2398681690 is about 48976.3380623746. The cubic root of 2398681690 is about 1338.6207107782.

The spelling of 2398681690 in words is "two billion, three hundred ninety-eight million, six hundred eighty-one thousand, six hundred ninety".