78227964 has 48 divisors (see below), whose sum is σ = 209815200. Its totient is φ = 25175808.

The previous prime is 78227957. The next prime is 78227969. The reversal of 78227964 is 46972287.

It is a super-2 number, since 2×78227964² = 12239228703170592, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78227969) 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, 9357 + ... + 15620.

It is an arithmetic number, because the mean of its divisors is an integer number (4371150).

Almost surely, 2^78227964 is an apocalyptic number.

It is an amenable number.

78227964 is an abundant number, since it is smaller than the sum of its proper divisors (131587236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78227964 is a wasteful number, since it uses less digits than its factorization.

78227964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25019 (or 25011 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 78227964 is about 8844.6573704129. The cubic root of 78227964 is about 427.6817079192.

The spelling of 78227964 in words is "seventy-eight million, two hundred twenty-seven thousand, nine hundred sixty-four".