1649298740 has 12 divisors (see below), whose sum is σ = 3463527396. Its totient is φ = 659719488.

The previous prime is 1649298737. The next prime is 1649298757. The reversal of 1649298740 is 478929461.

It can be written as a sum of positive squares in 2 ways, for example, as 904445476 + 744853264 = 30074^2 + 27292^2 .

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

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, 41232449 + ... + 41232488.

It is an arithmetic number, because the mean of its divisors is an integer number (288627283).

Almost surely, 2^1649298740 is an apocalyptic number.

1649298740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1649298740 is an abundant number, since it is smaller than the sum of its proper divisors (1814228656).

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

1649298740 is a wasteful number, since it uses less digits than its factorization.

1649298740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82464946 (or 82464944 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 50.

The square root of 1649298740 is about 40611.5591919345. The cubic root of 1649298740 is about 1181.4983217107.

The spelling of 1649298740 in words is "one billion, six hundred forty-nine million, two hundred ninety-eight thousand, seven hundred forty".