2457856 has 18 divisors (see below), whose sum is σ = 4906622. Its totient is φ = 1228800.

The previous prime is 2457839. The next prime is 2457869. The reversal of 2457856 is 6587542.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2310400 + 147456 = 1520^2 + 384^2 .

It is a super-2 number, since 2×2457856² = 12082112233472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4545 + ... + 5056.

2^2457856 is an apocalyptic number.

It is an amenable number.

2457856 is a deficient number, since it is larger than the sum of its proper divisors (2448766).

2457856 is an frugal number, since it uses more digits than its factorization.

2457856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9617 (or 9603 counting only the distinct ones).

The product of its digits is 67200, while the sum is 37.

The square root of 2457856 is about 1567.7550829131. The cubic root of 2457856 is about 134.9539120226.

The spelling of 2457856 in words is "two million, four hundred fifty-seven thousand, eight hundred fifty-six".