78223810 has 16 divisors (see below), whose sum is σ = 160917696. Its totient is φ = 26819568.

The previous prime is 78223799. The next prime is 78223811. The reversal of 78223810 is 1832287.

It is a super-2 number, since 2×78223810² = 12237928901832200, which contains 22 as substring.

It is a plaindrome in base 12.

It is a zygodrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (78223811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 558672 + ... + 558811.

It is an arithmetic number, because the mean of its divisors is an integer number (10057356).

Almost surely, 2^78223810 is an apocalyptic number.

78223810 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78223810 is an abundant number, since it is smaller than the sum of its proper divisors (82693886).

78223810 is a wasteful number, since it uses less digits than its factorization.

78223810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117497.

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

The square root of 78223810 is about 8844.4225362654. The cubic root of 78223810 is about 427.6741376456.

The spelling of 78223810 in words is "seventy-eight million, two hundred twenty-three thousand, eight hundred ten".