78218230 has 8 divisors (see below), whose sum is σ = 140792832. Its totient is φ = 31287288.

The previous prime is 78218213. The next prime is 78218243. The reversal of 78218230 is 3281287.

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

It is a super-2 number, since 2×78218230² = 12236183008665800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78218192 and 78218201.

It is a congruent number.

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, 3910902 + ... + 3910921.

It is an arithmetic number, because the mean of its divisors is an integer number (17599104).

Almost surely, 2^78218230 is an apocalyptic number.

78218230 is a deficient number, since it is larger than the sum of its proper divisors (62574602).

78218230 is a wasteful number, since it uses less digits than its factorization.

78218230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7821830.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 78218230 is about 8844.1070775969. The cubic root of 78218230 is about 427.6639681996.

The spelling of 78218230 in words is "seventy-eight million, two hundred eighteen thousand, two hundred thirty".