42371778 has 16 divisors (see below), whose sum is σ = 86810976. Its totient is φ = 13779360.

The previous prime is 42371731. The next prime is 42371779. The reversal of 42371778 is 87717324.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42371779) 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, 85876 + ... + 86367.

It is an arithmetic number, because the mean of its divisors is an integer number (5425686).

Almost surely, 2^42371778 is an apocalyptic number.

42371778 is an abundant number, since it is smaller than the sum of its proper divisors (44439198).

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

42371778 is a wasteful number, since it uses less digits than its factorization.

42371778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172289.

The product of its digits is 65856, while the sum is 39.

The square root of 42371778 is about 6509.3607981122. The cubic root of 42371778 is about 348.6252960447.

The spelling of 42371778 in words is "forty-two million, three hundred seventy-one thousand, seven hundred seventy-eight".