42319978 has 8 divisors (see below), whose sum is σ = 63884772. Its totient is φ = 21025056.

The previous prime is 42319951. The next prime is 42319993. The reversal of 42319978 is 87991324.

It can be written as a sum of positive squares in 2 ways, for example, as 41951529 + 368449 = 6477^2 + 607^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67075 + ... + 67702.

Almost surely, 2^42319978 is an apocalyptic number.

42319978 is a deficient number, since it is larger than the sum of its proper divisors (21564794).

42319978 is a wasteful number, since it uses less digits than its factorization.

42319978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134936.

The product of its digits is 108864, while the sum is 43.

The square root of 42319978 is about 6505.3806960085. The cubic root of 42319978 is about 348.4831719295.

The spelling of 42319978 in words is "forty-two million, three hundred nineteen thousand, nine hundred seventy-eight".