228678507 has 12 divisors (see below), whose sum is σ = 332419360. Its totient is φ = 151480368.

The previous prime is 228678503. The next prime is 228678511. The reversal of 228678507 is 705876822.

It is an interprime number because it is at equal distance from previous prime (228678503) and next prime (228678511).

It is not a de Polignac number, because 228678507 - 2² = 228678503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228678503) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79507 + ... + 82332.

Almost surely, 2^228678507 is an apocalyptic number.

228678507 is a deficient number, since it is larger than the sum of its proper divisors (103740853).

228678507 is a wasteful number, since it uses less digits than its factorization.

228678507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162002 (or 161999 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 228678507 is about 15122.1197918810. The cubic root of 228678507 is about 611.5168797086.

The spelling of 228678507 in words is "two hundred twenty-eight million, six hundred seventy-eight thousand, five hundred seven".