2257398 has 48 divisors (see below), whose sum is σ = 5752656. Its totient is φ = 630720.

The previous prime is 2257397. The next prime is 2257403. The reversal of 2257398 is 8937522.

It is a happy number.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2257391) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2136 + ... + 3012.

It is an arithmetic number, because the mean of its divisors is an integer number (119847).

2^2257398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2257398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2876328).

2257398 is an abundant number, since it is smaller than the sum of its proper divisors (3495258).

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

2257398 is a wasteful number, since it uses less digits than its factorization.

2257398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909 (or 906 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 2257398 is about 1502.4639762736. The cubic root of 2257398 is about 131.1805292219.

The spelling of 2257398 in words is "two million, two hundred fifty-seven thousand, three hundred ninety-eight".