78227965 has 24 divisors (see below), whose sum is σ = 102120480. Its totient is φ = 57485568.

The previous prime is 78227957. The next prime is 78227969. The reversal of 78227965 is 56972287.

It is not a de Polignac number, because 78227965 - 2³ = 78227957 is a prime.

It is a super-2 number, since 2×78227965² = 12239229016082450, which contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 61506 + ... + 62764.

It is an arithmetic number, because the mean of its divisors is an integer number (4255020).

Almost surely, 2^78227965 is an apocalyptic number.

It is an amenable number.

78227965 is a deficient number, since it is larger than the sum of its proper divisors (23892515).

78227965 is a wasteful number, since it uses less digits than its factorization.

78227965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341 (or 1324 counting only the distinct ones).

The product of its digits is 423360, while the sum is 46.

The square root of 78227965 is about 8844.6574269442. The cubic root of 78227965 is about 427.6817097416.

The spelling of 78227965 in words is "seventy-eight million, two hundred twenty-seven thousand, nine hundred sixty-five".