1639402298 has 8 divisors (see below), whose sum is σ = 2469842580. Its totient is φ = 816121440.

The previous prime is 1639402243. The next prime is 1639402309. The reversal of 1639402298 is 8922049361.

It can be written as a sum of positive squares in 2 ways, for example, as 1084187329 + 555214969 = 32927^2 + 23563^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1789283 + ... + 1790198.

Almost surely, 2^1639402298 is an apocalyptic number.

1639402298 is a deficient number, since it is larger than the sum of its proper divisors (830440282).

1639402298 is a wasteful number, since it uses less digits than its factorization.

1639402298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3579712.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 1639402298 is about 40489.5331906902. The cubic root of 1639402298 is about 1179.1304275266.

The spelling of 1639402298 in words is "one billion, six hundred thirty-nine million, four hundred two thousand, two hundred ninety-eight".