2457940 has 24 divisors (see below), whose sum is σ = 5251680. Its totient is φ = 966048.

The previous prime is 2457901. The next prime is 2457943. The reversal of 2457940 is 497542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2457943) 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, 139 + ... + 2221.

It is an arithmetic number, because the mean of its divisors is an integer number (218820).

2^2457940 is an apocalyptic number.

2457940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2457940 is an abundant number, since it is smaller than the sum of its proper divisors (2793740).

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

2457940 is a wasteful number, since it uses less digits than its factorization.

2457940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2151 (or 2149 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 2457940 is about 1567.7818725830. The cubic root of 2457940 is about 134.9554494058.

The spelling of 2457940 in words is "two million, four hundred fifty-seven thousand, nine hundred forty".