2400251440 has 20 divisors (see below), whose sum is σ = 5580584784. Its totient is φ = 960100544.

The previous prime is 2400251429. The next prime is 2400251449. The reversal of 2400251440 is 441520042.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×2400251440² = 11522413950444147200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2400251449) 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, 15001492 + ... + 15001651.

Almost surely, 2^2400251440 is an apocalyptic number.

2400251440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2400251440 is an abundant number, since it is smaller than the sum of its proper divisors (3180333344).

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

2400251440 is a wasteful number, since it uses less digits than its factorization.

2400251440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30003156 (or 30003150 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 2400251440 is about 48992.3610372066. The cubic root of 2400251440 is about 1338.9126547041.

Adding to 2400251440 its reverse (441520042), we get a palindrome (2841771482).

The spelling of 2400251440 in words is "two billion, four hundred million, two hundred fifty-one thousand, four hundred forty".