42304728 has 64 divisors (see below), whose sum is σ = 111248640. Its totient is φ = 13380224.

The previous prime is 42304709. The next prime is 42304729. The reversal of 42304728 is 82740324.

It is a super-2 number, since 2×42304728² = 3579380022307968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42304695 and 42304704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42304729) 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, 95275 + ... + 95717.

It is an arithmetic number, because the mean of its divisors is an integer number (1738260).

Almost surely, 2^42304728 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 42304728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55624320).

42304728 is an abundant number, since it is smaller than the sum of its proper divisors (68943912).

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

42304728 is a wasteful number, since it uses less digits than its factorization.

42304728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648 (or 644 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 42304728 is about 6504.2084837434. The cubic root of 42304728 is about 348.4413082748.

The spelling of 42304728 in words is "forty-two million, three hundred four thousand, seven hundred twenty-eight".