42555864 has 32 divisors (see below), whose sum is σ = 114574320. Its totient is φ = 13094016.

The previous prime is 42555833. The next prime is 42555869. The reversal of 42555864 is 46855524.

It is a super-2 number, since 2×42555864² = 3622003121572992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42555869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67887 + ... + 68510.

Almost surely, 2^42555864 is an apocalyptic number.

It is an amenable number.

42555864 is an abundant number, since it is smaller than the sum of its proper divisors (72018456).

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

42555864 is a wasteful number, since it uses less digits than its factorization.

42555864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136419 (or 136415 counting only the distinct ones).

The product of its digits is 192000, while the sum is 39.

The square root of 42555864 is about 6523.4855713798. The cubic root of 42555864 is about 349.1294391559.

The spelling of 42555864 in words is "forty-two million, five hundred fifty-five thousand, eight hundred sixty-four".