78214636 has 12 divisors (see below), whose sum is σ = 137178328. Its totient is φ = 39020832.

The previous prime is 78214579. The next prime is 78214639. The reversal of 78214636 is 63641287.

It is a super-2 number, since 2×78214636² = 12235058569224992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78214595 and 78214604.

It is not an unprimeable number, because it can be changed into a prime (78214639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19566 + ... + 23221.

Almost surely, 2^78214636 is an apocalyptic number.

It is an amenable number.

78214636 is a deficient number, since it is larger than the sum of its proper divisors (58963692).

78214636 is a wasteful number, since it uses less digits than its factorization.

78214636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43248 (or 43246 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The square root of 78214636 is about 8843.9038891205. The cubic root of 78214636 is about 427.6574179455.

The spelling of 78214636 in words is "seventy-eight million, two hundred fourteen thousand, six hundred thirty-six".