42798728 has 32 divisors (see below), whose sum is σ = 92668800. Its totient is φ = 18150912.

The previous prime is 42798727. The next prime is 42798733. The reversal of 42798728 is 82789724.

It is a happy number.

It is a super-2 number, since 2×42798728² = 3663462236835968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42798727) 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, 1493 + ... + 9371.

It is an arithmetic number, because the mean of its divisors is an integer number (2895900).

Almost surely, 2^42798728 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 42798728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46334400).

42798728 is an abundant number, since it is smaller than the sum of its proper divisors (49870072).

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

42798728 is a wasteful number, since it uses less digits than its factorization.

42798728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7989 (or 7985 counting only the distinct ones).

The product of its digits is 451584, while the sum is 47.

The square root of 42798728 is about 6542.0736773595. The cubic root of 42798728 is about 349.7923339524.

The spelling of 42798728 in words is "forty-two million, seven hundred ninety-eight thousand, seven hundred twenty-eight".