2400723865 has 12 divisors (see below), whose sum is σ = 2930545764. Its totient is φ = 1888013216.

The previous prime is 2400723863. The next prime is 2400723883. The reversal of 2400723865 is 5683270042.

It can be written as a sum of positive squares in 2 ways, for example, as 1430276761 + 970447104 = 37819^2 + 31152^2 .

It is not a de Polignac number, because 2400723865 - 2¹ = 2400723863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2400723863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51562 + ... + 86371.

It is an arithmetic number, because the mean of its divisors is an integer number (244212147).

Almost surely, 2^2400723865 is an apocalyptic number.

It is an amenable number.

2400723865 is a deficient number, since it is larger than the sum of its proper divisors (529821899).

2400723865 is an equidigital number, since it uses as much as digits as its factorization.

2400723865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138056 (or 137997 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 2400723865 is about 48997.1822148988. The cubic root of 2400723865 is about 1339.0004919345. Note that the first 3 decimals are identical.

The spelling of 2400723865 in words is "two billion, four hundred million, seven hundred twenty-three thousand, eight hundred sixty-five".