2257740 has 96 divisors (see below), whose sum is σ = 7277760. Its totient is φ = 580608.

The previous prime is 2257733. The next prime is 2257757. The reversal of 2257740 is 477522.

2257740 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19924 + ... + 20036.

It is an arithmetic number, because the mean of its divisors is an integer number (75810).

2^2257740 is an apocalyptic number.

2257740 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 2257740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3638880).

2257740 is an abundant number, since it is smaller than the sum of its proper divisors (5020020).

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

2257740 is a wasteful number, since it uses less digits than its factorization.

2257740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 2257740 is about 1502.5777850082. The cubic root of 2257740 is about 131.1871535855.

The spelling of 2257740 in words is "two million, two hundred fifty-seven thousand, seven hundred forty".