78115342 has 4 divisors (see below), whose sum is σ = 117173016. Its totient is φ = 39057670.

The previous prime is 78115333. The next prime is 78115343. The reversal of 78115342 is 24351187.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×78115342² = 12204013311553928, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78115343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19528834 + ... + 19528837.

It is an arithmetic number, because the mean of its divisors is an integer number (29293254).

Almost surely, 2^78115342 is an apocalyptic number.

78115342 is a deficient number, since it is larger than the sum of its proper divisors (39057674).

78115342 is a wasteful number, since it uses less digits than its factorization.

78115342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39057673.

The product of its digits is 6720, while the sum is 31.

The square root of 78115342 is about 8838.2884089625. The cubic root of 78115342 is about 427.4763699990.

The spelling of 78115342 in words is "seventy-eight million, one hundred fifteen thousand, three hundred forty-two".