42558840 has 48 divisors (see below), whose sum is σ = 138317400. Its totient is φ = 11348928.

The previous prime is 42558839. The next prime is 42558853. The reversal of 42558840 is 4885524.

It is a super-2 number, since 2×42558840² = 3622509724291200, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 42558795 and 42558804.

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, 58750 + ... + 59469.

Almost surely, 2^42558840 is an apocalyptic number.

42558840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42558840 is an abundant number, since it is smaller than the sum of its proper divisors (95758560).

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

42558840 is a wasteful number, since it uses less digits than its factorization.

42558840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118236 (or 118229 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 36.

The square root of 42558840 is about 6523.7136663100. The cubic root of 42558840 is about 349.1375773605.

The spelling of 42558840 in words is "forty-two million, five hundred fifty-eight thousand, eight hundred forty".