2855658 has 32 divisors (see below), whose sum is σ = 6354432. Its totient is φ = 849600.

The previous prime is 2855653. The next prime is 2855683. The reversal of 2855658 is 8565582.

It is a super-2 number, since 2×2855658² = 16309565225928, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (2855653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1828 + ... + 3008.

It is an arithmetic number, because the mean of its divisors is an integer number (198576).

2^2855658 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2855658, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3177216).

2855658 is an abundant number, since it is smaller than the sum of its proper divisors (3498774).

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

2855658 is a wasteful number, since it uses less digits than its factorization.

2855658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230.

The product of its digits is 96000, while the sum is 39.

The square root of 2855658 is about 1689.8692257095. The cubic root of 2855658 is about 141.8737554148.

The spelling of 2855658 in words is "two million, eight hundred fifty-five thousand, six hundred fifty-eight".