2563740 has 36 divisors (see below), whose sum is σ = 7777224. Its totient is φ = 683616.

The previous prime is 2563733. The next prime is 2563747. The reversal of 2563740 is 473652.

It is a happy number.

2563740 is a `hidden beast` number, since 25 + 637 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (2563733) and next prime (2563747).

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2563747) 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, 6942 + ... + 7301.

It is an arithmetic number, because the mean of its divisors is an integer number (216034).

2^2563740 is an apocalyptic number.

2563740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2563740 is an abundant number, since it is smaller than the sum of its proper divisors (5213484).

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

2563740 is a wasteful number, since it uses less digits than its factorization.

2563740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14258 (or 14253 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 2563740 is about 1601.1683234439. The cubic root of 2563740 is about 136.8646611319.

The spelling of 2563740 in words is "two million, five hundred sixty-three thousand, seven hundred forty".