42272784 has 60 divisors (see below), whose sum is σ = 121074096. Its totient is φ = 13761216.

The previous prime is 42272771. The next prime is 42272801. The reversal of 42272784 is 48727224.

It is a super-2 number, since 2×42272784² = 3573976534221312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2779 + ... + 9605.

Almost surely, 2^42272784 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 42272784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60537048).

42272784 is an abundant number, since it is smaller than the sum of its proper divisors (78801312).

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

42272784 is a wasteful number, since it uses less digits than its factorization.

42272784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6884 (or 6875 counting only the distinct ones).

The product of its digits is 50176, while the sum is 36.

The square root of 42272784 is about 6501.7523791667. The cubic root of 42272784 is about 348.3535843378.

The spelling of 42272784 in words is "forty-two million, two hundred seventy-two thousand, seven hundred eighty-four".