42312618 has 28 divisors (see below), whose sum is σ = 95163138. Its totient is φ = 14103720.

The previous prime is 42312553. The next prime is 42312629. The reversal of 42312618 is 81621324.

42312618 is a `hidden beast` number, since 42 + 3 + 1 + 2 + 618 = 666.

It can be written as a sum of positive squares in only one way, i.e., 23882769 + 18429849 = 4887^2 + 4293^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a nialpdrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 42312591 and 42312600.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 13053 + ... + 15968.

Almost surely, 2^42312618 is an apocalyptic number.

42312618 is an abundant number, since it is smaller than the sum of its proper divisors (52850520).

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

42312618 is an equidigital number, since it uses as much as digits as its factorization.

42312618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29041 (or 29026 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 42312618 is about 6504.8149858393. The cubic root of 42312618 is about 348.4629688248.

It can be divided in two parts, 423 and 12618, that added together give a triangular number (13041 = T₁₆₁).

The spelling of 42312618 in words is "forty-two million, three hundred twelve thousand, six hundred eighteen".