42424428 has 12 divisors (see below), whose sum is σ = 98990360. Its totient is φ = 14141472.

The previous prime is 42424423. The next prime is 42424429. The reversal of 42424428 is 82442424.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×42424428² = 3599664182254368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42424395 and 42424404.

It is not an unprimeable number, because it can be changed into a prime (42424423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1767673 + ... + 1767696.

Almost surely, 2^42424428 is an apocalyptic number.

It is an amenable number.

42424428 is an abundant number, since it is smaller than the sum of its proper divisors (56565932).

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

42424428 is a wasteful number, since it uses less digits than its factorization.

42424428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3535376 (or 3535374 counting only the distinct ones).

The product of its digits is 16384, while the sum is 30.

The square root of 42424428 is about 6513.4037184870. The cubic root of 42424428 is about 348.7696336630.

The spelling of 42424428 in words is "forty-two million, four hundred twenty-four thousand, four hundred twenty-eight".