42666528 has 24 divisors (see below), whose sum is σ = 111999888. Its totient is φ = 14222144.

The previous prime is 42666523. The next prime is 42666577. The reversal of 42666528 is 82566624.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×42666528² = 3640865223149568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42666523) 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, 222126 + ... + 222317.

It is an arithmetic number, because the mean of its divisors is an integer number (4666662).

Almost surely, 2^42666528 is an apocalyptic number.

42666528 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

42666528 is an abundant number, since it is smaller than the sum of its proper divisors (69333360).

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

42666528 is a wasteful number, since it uses less digits than its factorization.

42666528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444456 (or 444448 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The square root of 42666528 is about 6531.9620329576. The cubic root of 42666528 is about 349.4318073426.

The spelling of 42666528 in words is "forty-two million, six hundred sixty-six thousand, five hundred twenty-eight".