78266038 has 4 divisors (see below), whose sum is σ = 117399060. Its totient is φ = 39133018.

The previous prime is 78266021. The next prime is 78266039. The reversal of 78266038 is 83066287.

It is a happy number.

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

It is a super-2 number, since 2×78266038² = 12251145408434888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78266039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19566508 + ... + 19566511.

It is an arithmetic number, because the mean of its divisors is an integer number (29349765).

Almost surely, 2^78266038 is an apocalyptic number.

78266038 is a deficient number, since it is larger than the sum of its proper divisors (39133022).

78266038 is a wasteful number, since it uses less digits than its factorization.

78266038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39133021.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 78266038 is about 8846.8094813893. The cubic root of 78266038 is about 427.7510817145.

The spelling of 78266038 in words is "seventy-eight million, two hundred sixty-six thousand, thirty-eight".