78227955 has 24 divisors (see below), whose sum is σ = 146026608. Its totient is φ = 38511936.

The previous prime is 78227951. The next prime is 78227957. The reversal of 78227955 is 55972287.

It is a happy number.

It is not a de Polignac number, because 78227955 - 2² = 78227951 is a prime.

It is a super-2 number, since 2×78227955² = 12239225886964050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 78227955.

It is not an unprimeable number, because it can be changed into a prime (78227951) 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, 66277 + ... + 67446.

It is an arithmetic number, because the mean of its divisors is an integer number (6084442).

Almost surely, 2^78227955 is an apocalyptic number.

78227955 is a deficient number, since it is larger than the sum of its proper divisors (67798653).

78227955 is a wasteful number, since it uses less digits than its factorization.

78227955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133747 (or 133744 counting only the distinct ones).

The product of its digits is 352800, while the sum is 45.

The square root of 78227955 is about 8844.6568616312. The cubic root of 78227955 is about 427.6816915178.

The spelling of 78227955 in words is "seventy-eight million, two hundred twenty-seven thousand, nine hundred fifty-five".