2455723840 has 28 divisors (see below), whose sum is σ = 5847693156. Its totient is φ = 982289408.

The previous prime is 2455723801. The next prime is 2455723843. The reversal of 2455723840 is 483275542.

2455723840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1093228096 + 1362495744 = 33064^2 + 36912^2 .

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 = 2455723793 and 2455723802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2455723843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3836749 + ... + 3837388.

Almost surely, 2^2455723840 is an apocalyptic number.

2455723840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2455723840 is an abundant number, since it is smaller than the sum of its proper divisors (3391969316).

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

2455723840 is an equidigital number, since it uses as much as digits as its factorization.

2455723840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7674154 (or 7674144 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 40.

The square root of 2455723840 is about 49555.2604674822. The cubic root of 2455723840 is about 1349.1487711065.

The spelling of 2455723840 in words is "two billion, four hundred fifty-five million, seven hundred twenty-three thousand, eight hundred forty".