2881428 has 48 divisors (see below), whose sum is σ = 7451136. Its totient is φ = 859360.

The previous prime is 2881427. The next prime is 2881433. The reversal of 2881428 is 8241882.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2881427) 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, 10825 + ... + 11087.

It is an arithmetic number, because the mean of its divisors is an integer number (155232).

2^2881428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2881428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3725568).

2881428 is an abundant number, since it is smaller than the sum of its proper divisors (4569708).

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

2881428 is a wasteful number, since it uses less digits than its factorization.

2881428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364 (or 362 counting only the distinct ones).

The product of its digits is 8192, while the sum is 33.

The square root of 2881428 is about 1697.4769512426. The cubic root of 2881428 is about 142.2992433110.

The spelling of 2881428 in words is "two million, eight hundred eighty-one thousand, four hundred twenty-eight".