42420636 has 36 divisors (see below), whose sum is σ = 108529512. Its totient is φ = 13968864.

The previous prime is 42420619. The next prime is 42420659. The reversal of 42420636 is 63602424.

42420636 is a `hidden beast` number, since 4 + 2 + 4 + 20 + 636 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

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, 4111 + ... + 10086.

Almost surely, 2^42420636 is an apocalyptic number.

It is an amenable number.

42420636 is an abundant number, since it is smaller than the sum of its proper divisors (66108876).

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

42420636 is a wasteful number, since it uses less digits than its factorization.

42420636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14290 (or 14285 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 42420636 is about 6513.1126199383. The cubic root of 42420636 is about 348.7592420567.

The spelling of 42420636 in words is "forty-two million, four hundred twenty thousand, six hundred thirty-six".