2402540 has 36 divisors (see below), whose sum is σ = 5810448. Its totient is φ = 817440.

The previous prime is 2402537. The next prime is 2402549. The reversal of 2402540 is 452042.

It is not an unprimeable number, because it can be changed into a prime (2402549) 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, 18275 + ... + 18405.

2^2402540 is an apocalyptic number.

2402540 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 2402540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2905224).

2402540 is an abundant number, since it is smaller than the sum of its proper divisors (3407908).

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

2402540 is a wasteful number, since it uses less digits than its factorization.

2402540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 2402540 is about 1550.0129031721. The cubic root of 2402540 is about 133.9338055774.

Adding to 2402540 its reverse (452042), we get a palindrome (2854582).

The spelling of 2402540 in words is "two million, four hundred two thousand, five hundred forty".