2381428 has 24 divisors (see below), whose sum is σ = 5044032. Its totient is φ = 960384.

The previous prime is 2381413. The next prime is 2381429. The reversal of 2381428 is 8241832.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 2381396 and 2381405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2381429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2026 + ... + 2977.

It is an arithmetic number, because the mean of its divisors is an integer number (210168).

2^2381428 is an apocalyptic number.

2381428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2381428 is an abundant number, since it is smaller than the sum of its proper divisors (2662604).

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

2381428 is a wasteful number, since it uses less digits than its factorization.

2381428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5031 (or 5029 counting only the distinct ones).

The product of its digits is 3072, while the sum is 28.

The square root of 2381428 is about 1543.1876101110. The cubic root of 2381428 is about 133.5403423271.

It can be divided in two parts, 2381 and 428, that added together give a square (2809 = 53²).

The spelling of 2381428 in words is "two million, three hundred eighty-one thousand, four hundred twenty-eight".