78228573 has 8 divisors (see below), whose sum is σ = 107901600. Its totient is φ = 50353968.

The previous prime is 78228569. The next prime is 78228599. The reversal of 78228573 is 37582287.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78228573 - 2² = 78228569 is a prime.

It is a super-2 number, since 2×78228573² = 12239419267232658, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78228523) 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, 449503 + ... + 449676.

It is an arithmetic number, because the mean of its divisors is an integer number (13487700).

Almost surely, 2^78228573 is an apocalyptic number.

It is an amenable number.

78228573 is a deficient number, since it is larger than the sum of its proper divisors (29673027).

78228573 is a wasteful number, since it uses less digits than its factorization.

78228573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899211.

The product of its digits is 188160, while the sum is 42.

The square root of 78228573 is about 8844.6917979091. The cubic root of 78228573 is about 427.6828177418.

The spelling of 78228573 in words is "seventy-eight million, two hundred twenty-eight thousand, five hundred seventy-three".