1649892944 has 20 divisors (see below), whose sum is σ = 3653334624. Its totient is φ = 707096928.

The previous prime is 1649892919. The next prime is 1649892983. The reversal of 1649892944 is 4492989461.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a self number, because there is not a number n which added to its sum of digits gives 1649892944.

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, 7365482 + ... + 7365705.

Almost surely, 2^1649892944 is an apocalyptic number.

1649892944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1649892944 is an abundant number, since it is smaller than the sum of its proper divisors (2003441680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1649892944 is a wasteful number, since it uses less digits than its factorization.

1649892944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14731202 (or 14731196 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 56.

The square root of 1649892944 is about 40618.8742335383. The cubic root of 1649892944 is about 1181.6401934686.

The spelling of 1649892944 in words is "one billion, six hundred forty-nine million, eight hundred ninety-two thousand, nine hundred forty-four".