1646242798 has 16 divisors (see below), whose sum is σ = 2483177760. Its totient is φ = 818528256.

The previous prime is 1646242789. The next prime is 1646242837. The reversal of 1646242798 is 8972426461.

It is a congruent number.

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, 343543 + ... + 348301.

It is an arithmetic number, because the mean of its divisors is an integer number (155198610).

Almost surely, 2^1646242798 is an apocalyptic number.

1646242798 is a deficient number, since it is larger than the sum of its proper divisors (836934962).

1646242798 is a wasteful number, since it uses less digits than its factorization.

1646242798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5691.

The product of its digits is 1161216, while the sum is 49.

The square root of 1646242798 is about 40573.9177058366. The cubic root of 1646242798 is about 1180.7681482246.

The spelling of 1646242798 in words is "one billion, six hundred forty-six million, two hundred forty-two thousand, seven hundred ninety-eight".