2281428 has 36 divisors (see below), whose sum is σ = 5824000. Its totient is φ = 752976.

The previous prime is 2281403. The next prime is 2281429. The reversal of 2281428 is 8241822.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2281429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4323 + ... + 4821.

2^2281428 is an apocalyptic number.

It is an amenable number.

2281428 is an abundant number, since it is smaller than the sum of its proper divisors (3542572).

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

2281428 is a wasteful number, since it uses less digits than its factorization.

2281428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636 (or 631 counting only the distinct ones).

The product of its digits is 2048, while the sum is 27.

The square root of 2281428 is about 1510.4396710892. The cubic root of 2281428 is about 131.6443594818.

It can be divided in two parts, 228142 and 8, that added together give a triangular number (228150 = T₆₇₅).

The spelling of 2281428 in words is "two million, two hundred eighty-one thousand, four hundred twenty-eight".