42817478 has 16 divisors (see below), whose sum is σ = 70374096. Its totient is φ = 19376640.

The previous prime is 42817471. The next prime is 42817483. The reversal of 42817478 is 87471824.

It is a happy number.

It is a super-4 number, since 4×42817478⁴ (a number of 32 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42817471) 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, 950 + ... + 9302.

It is an arithmetic number, because the mean of its divisors is an integer number (4398381).

Almost surely, 2^42817478 is an apocalyptic number.

42817478 is a deficient number, since it is larger than the sum of its proper divisors (27556618).

42817478 is a wasteful number, since it uses less digits than its factorization.

42817478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8599.

The product of its digits is 100352, while the sum is 41.

The square root of 42817478 is about 6543.5065523005. The cubic root of 42817478 is about 349.8434075009.

The spelling of 42817478 in words is "forty-two million, eight hundred seventeen thousand, four hundred seventy-eight".