73978042 has 8 divisors (see below), whose sum is σ = 111047796. Its totient is φ = 36962112.

The previous prime is 73978019. The next prime is 73978057. The reversal of 73978042 is 24087937.

It can be written as a sum of positive squares in 2 ways, for example, as 73977201 + 841 = 8601^2 + 29^2 .

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 = 73977986 and 73978004.

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, 9823 + ... + 15634.

Almost surely, 2^73978042 is an apocalyptic number.

73978042 is a deficient number, since it is larger than the sum of its proper divisors (37069754).

73978042 is a wasteful number, since it uses less digits than its factorization.

73978042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26912.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 73978042 is about 8601.0488895250. The cubic root of 73978042 is about 419.7921155648.

The spelling of 73978042 in words is "seventy-three million, nine hundred seventy-eight thousand, forty-two".