42173478 has 24 divisors (see below), whose sum is σ = 93102048. Its totient is φ = 13792272.

The previous prime is 42173471. The next prime is 42173491. The reversal of 42173478 is 87437124.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42173471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21150 + ... + 23057.

It is an arithmetic number, because the mean of its divisors is an integer number (3879252).

Almost surely, 2^42173478 is an apocalyptic number.

42173478 is an abundant number, since it is smaller than the sum of its proper divisors (50928570).

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

42173478 is a wasteful number, since it uses less digits than its factorization.

42173478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44268 (or 44265 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 42173478 is about 6494.1110246130. Note that the first 3 decimals coincide. The cubic root of 42173478 is about 348.0805897383.

The spelling of 42173478 in words is "forty-two million, one hundred seventy-three thousand, four hundred seventy-eight".