2557698 has 48 divisors (see below), whose sum is σ = 6077568. Its totient is φ = 712800.

The previous prime is 2557697. The next prime is 2557729. The reversal of 2557698 is 8967552.

It is a d-powerful number, because it can be written as 2¹⁹ + 5⁷ + 5⁹ + 7³ + 6⁴ + 9 + 8³ .

Its product of digits (151200) is a multiple of the sum of its prime divisors (300).

It is not an unprimeable number, because it can be changed into a prime (2557691) 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, 9303 + ... + 9573.

It is an arithmetic number, because the mean of its divisors is an integer number (126616).

2^2557698 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2557698, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3038784).

2557698 is an abundant number, since it is smaller than the sum of its proper divisors (3519870).

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

2557698 is a wasteful number, since it uses less digits than its factorization.

2557698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311 (or 300 counting only the distinct ones).

The product of its digits is 151200, while the sum is 42.

The square root of 2557698 is about 1599.2804632084. The cubic root of 2557698 is about 136.7570596393.

The spelling of 2557698 in words is "two million, five hundred fifty-seven thousand, six hundred ninety-eight".