42618642 has 16 divisors (see below), whose sum is σ = 92986272. Its totient is φ = 12914720.

The previous prime is 42618637. The next prime is 42618649. The reversal of 42618642 is 24681624.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (42618649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322803 + ... + 322934.

It is an arithmetic number, because the mean of its divisors is an integer number (5811642).

Almost surely, 2^42618642 is an apocalyptic number.

42618642 is an abundant number, since it is smaller than the sum of its proper divisors (50367630).

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

42618642 is a wasteful number, since it uses less digits than its factorization.

42618642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645753.

The product of its digits is 18432, while the sum is 33.

The square root of 42618642 is about 6528.2954896359. The cubic root of 42618642 is about 349.3010322661.

The spelling of 42618642 in words is "forty-two million, six hundred eighteen thousand, six hundred forty-two".