42697188 has 18 divisors (see below), whose sum is σ = 107929094. Its totient is φ = 14232384.

The previous prime is 42697181. The next prime is 42697211. The reversal of 42697188 is 88179624.

It can be written as a sum of positive squares in only one way, i.e., 26440164 + 16257024 = 5142^2 + 4032^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (42697181) 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 5 ways as a sum of consecutive naturals, for example, 592981 + ... + 593052.

Almost surely, 2^42697188 is an apocalyptic number.

It is an amenable number.

42697188 is an abundant number, since it is smaller than the sum of its proper divisors (65231906).

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

42697188 is a wasteful number, since it uses less digits than its factorization.

42697188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1186043 (or 1186038 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 42697188 is about 6534.3085326605. The cubic root of 42697188 is about 349.5154874113.

The spelling of 42697188 in words is "forty-two million, six hundred ninety-seven thousand, one hundred eighty-eight".