1640538298 has 16 divisors (see below), whose sum is σ = 2819900160. Its totient is φ = 701200656.

The previous prime is 1640538257. The next prime is 1640538313. The reversal of 1640538298 is 8928350461.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151858 + ... + 162301.

It is an arithmetic number, because the mean of its divisors is an integer number (176243760).

Almost surely, 2^1640538298 is an apocalyptic number.

1640538298 is a deficient number, since it is larger than the sum of its proper divisors (1179361862).

1640538298 is a wasteful number, since it uses less digits than its factorization.

1640538298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314541.

The product of its (nonzero) digits is 414720, while the sum is 46.

The square root of 1640538298 is about 40503.5590781847. The cubic root of 1640538298 is about 1179.4027184082.

The spelling of 1640538298 in words is "one billion, six hundred forty million, five hundred thirty-eight thousand, two hundred ninety-eight".