78223069 has 16 divisors (see below), whose sum is σ = 88777728. Its totient is φ = 68504832.

The previous prime is 78223051. The next prime is 78223097. The reversal of 78223069 is 96032287.

It is not a de Polignac number, because 78223069 - 2⁵ = 78223037 is a prime.

It is a super-2 number, since 2×78223069² = 12237697047557522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78223049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11764 + ... + 17170.

It is an arithmetic number, because the mean of its divisors is an integer number (5548608).

Almost surely, 2^78223069 is an apocalyptic number.

It is an amenable number.

78223069 is a deficient number, since it is larger than the sum of its proper divisors (10554659).

78223069 is a wasteful number, since it uses less digits than its factorization.

78223069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5484.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 78223069 is about 8844.3806453590. The cubic root of 78223069 is about 427.6727872148.

The spelling of 78223069 in words is "seventy-eight million, two hundred twenty-three thousand, sixty-nine".