78474231 has 32 divisors (see below), whose sum is σ = 127683840. Its totient is φ = 47239200.

The previous prime is 78474217. The next prime is 78474233. The reversal of 78474231 is 13247487.

It is a happy number.

It is not a de Polignac number, because 78474231 - 2⁷ = 78474103 is a prime.

It is a super-2 number, since 2×78474231² = 12316409862082722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78474233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47601 + ... + 49221.

It is an arithmetic number, because the mean of its divisors is an integer number (3990120).

Almost surely, 2^78474231 is an apocalyptic number.

78474231 is a deficient number, since it is larger than the sum of its proper divisors (49209609).

78474231 is a wasteful number, since it uses less digits than its factorization.

78474231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804 (or 1798 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 78474231 is about 8858.5682251705. The cubic root of 78474231 is about 428.1300282571.

The spelling of 78474231 in words is "seventy-eight million, four hundred seventy-four thousand, two hundred thirty-one".