2528440 has 16 divisors (see below), whose sum is σ = 5689080. Its totient is φ = 1011360.

The previous prime is 2528419. The next prime is 2528441. The reversal of 2528440 is 448252.

2528440 = 390² + 391² + ... + 405².

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2528441) 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, 31566 + ... + 31645.

2^2528440 is an apocalyptic number.

2528440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2528440 is an abundant number, since it is smaller than the sum of its proper divisors (3160640).

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

2528440 is a wasteful number, since it uses less digits than its factorization.

2528440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63222 (or 63218 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 2528440 is about 1590.1069146444. The cubic root of 2528440 is about 136.2335950846.

The spelling of 2528440 in words is "two million, five hundred twenty-eight thousand, four hundred forty".