2481440 has 48 divisors (see below), whose sum is σ = 6318648. Its totient is φ = 915456.

The previous prime is 2481433. The next prime is 2481449. The reversal of 2481440 is 441842.

It can be written as a sum of positive squares in 4 ways, for example, as 1567504 + 913936 = 1252^2 + 956^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2481449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1484 + ... + 2676.

2^2481440 is an apocalyptic number.

2481440 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 2481440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3159324).

2481440 is an abundant number, since it is smaller than the sum of its proper divisors (3837208).

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

2481440 is a wasteful number, since it uses less digits than its factorization.

2481440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221 (or 1213 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 2481440 is about 1575.2587089110. The cubic root of 2481440 is about 135.3841822936.

The spelling of 2481440 in words is "two million, four hundred eighty-one thousand, four hundred forty".