1649840734 has 8 divisors (see below), whose sum is σ = 2508662160. Its totient is φ = 813620016.

The previous prime is 1649840729. The next prime is 1649840749. The reversal of 1649840734 is 4370489461.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5649994 + ... + 5650285.

It is an arithmetic number, because the mean of its divisors is an integer number (313582770).

Almost surely, 2^1649840734 is an apocalyptic number.

1649840734 is a deficient number, since it is larger than the sum of its proper divisors (858821426).

1649840734 is a wasteful number, since it uses less digits than its factorization.

1649840734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11300354.

The product of its (nonzero) digits is 580608, while the sum is 46.

The square root of 1649840734 is about 40618.2315469298. The cubic root of 1649840734 is about 1181.6277292083.

The spelling of 1649840734 in words is "one billion, six hundred forty-nine million, eight hundred forty thousand, seven hundred thirty-four".