42566840 has 32 divisors (see below), whose sum is σ = 100818000. Its totient is φ = 16130304.

The previous prime is 42566803. The next prime is 42566851. The reversal of 42566840 is 4866524.

It is a self number, because there is not a number n which added to its sum of digits gives 42566840.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27245 + ... + 28764.

Almost surely, 2^42566840 is an apocalyptic number.

42566840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42566840 is an abundant number, since it is smaller than the sum of its proper divisors (58251160).

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

42566840 is a wasteful number, since it uses less digits than its factorization.

42566840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56039 (or 56035 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 35.

The square root of 42566840 is about 6524.3267851940. The cubic root of 42566840 is about 349.1594523743.

The spelling of 42566840 in words is "forty-two million, five hundred sixty-six thousand, eight hundred forty".