42388546 has 8 divisors (see below), whose sum is σ = 65775420. Its totient is φ = 20463408.

The previous prime is 42388543. The next prime is 42388559. The reversal of 42388546 is 64588324.

It can be written as a sum of positive squares in 2 ways, for example, as 37149025 + 5239521 = 6095^2 + 2289^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 42388499 and 42388508.

It is not an unprimeable number, because it can be changed into a prime (42388543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 365361 + ... + 365476.

Almost surely, 2^42388546 is an apocalyptic number.

42388546 is a deficient number, since it is larger than the sum of its proper divisors (23386874).

42388546 is a wasteful number, since it uses less digits than its factorization.

42388546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730868.

The product of its digits is 184320, while the sum is 40.

The square root of 42388546 is about 6510.6486619998. The cubic root of 42388546 is about 348.6712777357.

The spelling of 42388546 in words is "forty-two million, three hundred eighty-eight thousand, five hundred forty-six".