2649000380 has 96 divisors (see below), whose sum is σ = 6157846464. Its totient is φ = 951035904.

The previous prime is 2649000379. The next prime is 2649000383. The reversal of 2649000380 is 830009462.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2649000383) by changing a digit.

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, 3498962 + ... + 3499718.

It is an arithmetic number, because the mean of its divisors is an integer number (64144234).

Almost surely, 2^2649000380 is an apocalyptic number.

2649000380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2649000380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3078923232).

2649000380 is an abundant number, since it is smaller than the sum of its proper divisors (3508846084).

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

2649000380 is a wasteful number, since it uses less digits than its factorization.

2649000380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135 (or 1133 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 2649000380 is about 51468.4406214138. The cubic root of 2649000380 is about 1383.6534815539.

The spelling of 2649000380 in words is "two billion, six hundred forty-nine million, three hundred eighty", and thus it is an aban number.