3649761870 has 64 divisors (see below), whose sum is σ = 9267540480. Its totient is φ = 917336448.

The previous prime is 3649761847. The next prime is 3649761883. The reversal of 3649761870 is 781679463.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96039 + ... + 128541.

It is an arithmetic number, because the mean of its divisors is an integer number (144805320).

Almost surely, 2^3649761870 is an apocalyptic number.

3649761870 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3649761870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4633770240).

3649761870 is an abundant number, since it is smaller than the sum of its proper divisors (5617778610).

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

3649761870 is a wasteful number, since it uses less digits than its factorization.

3649761870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32729.

The product of its (nonzero) digits is 1524096, while the sum is 51.

The square root of 3649761870 is about 60413.2590579254. The cubic root of 3649761870 is about 1539.6482400612.

The spelling of 3649761870 in words is "three billion, six hundred forty-nine million, seven hundred sixty-one thousand, eight hundred seventy".