42858855 has 32 divisors (see below), whose sum is σ = 82057920. Its totient is φ = 21098880.

The previous prime is 42858841. The next prime is 42858857. The reversal of 42858855 is 55885824.

It is not a de Polignac number, because 42858855 - 2⁶ = 42858791 is a prime.

It is a super-2 number, since 2×42858855² = 3673762903822050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 42858855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42858857) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10456 + ... + 13965.

It is an arithmetic number, because the mean of its divisors is an integer number (2564310).

Almost surely, 2^42858855 is an apocalyptic number.

42858855 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

42858855 is a deficient number, since it is larger than the sum of its proper divisors (39199065).

42858855 is a wasteful number, since it uses less digits than its factorization.

42858855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24448 (or 24442 counting only the distinct ones).

The product of its digits is 512000, while the sum is 45.

The square root of 42858855 is about 6546.6674728445. The cubic root of 42858855 is about 349.9560625117.

The spelling of 42858855 in words is "forty-two million, eight hundred fifty-eight thousand, eight hundred fifty-five".