2549341840 has 80 divisors (see below), whose sum is σ = 6002615808. Its totient is φ = 1006857728.

The previous prime is 2549341819. The next prime is 2549341849. The reversal of 2549341840 is 481439452.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 2549341793 and 2549341802.

It is not an unprimeable number, because it can be changed into a prime (2549341849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2310729 + ... + 2311831.

Almost surely, 2^2549341840 is an apocalyptic number.

2549341840 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 2549341840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3001307904).

2549341840 is an abundant number, since it is smaller than the sum of its proper divisors (3453273968).

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

2549341840 is a wasteful number, since it uses less digits than its factorization.

2549341840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1456 (or 1450 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 2549341840 is about 50491.0075161904. The cubic root of 2549341840 is about 1366.0796585407.

The spelling of 2549341840 in words is "two billion, five hundred forty-nine million, three hundred forty-one thousand, eight hundred forty".