2515440 has 80 divisors (see below), whose sum is σ = 7999488. Its totient is φ = 653568.

The previous prime is 2515427. The next prime is 2515451. The reversal of 2515440 is 445152.

2515440 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11169 + ... + 11391.

2^2515440 is an apocalyptic number.

2515440 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 2515440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3999744).

2515440 is an abundant number, since it is smaller than the sum of its proper divisors (5484048).

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

2515440 is a wasteful number, since it uses less digits than its factorization.

2515440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 280 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 2515440 is about 1586.0138713139. The cubic root of 2515440 is about 135.9997116488. Note that the first 3 decimals are identical.

The spelling of 2515440 in words is "two million, five hundred fifteen thousand, four hundred forty".