228917907 has 12 divisors (see below), whose sum is σ = 342906200. Its totient is φ = 152611776.

The previous prime is 228917891. The next prime is 228917911. The reversal of 228917907 is 709719822.

It is not a de Polignac number, because 228917907 - 2⁴ = 228917891 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228917917) 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, 470782 + ... + 471267.

Almost surely, 2^228917907 is an apocalyptic number.

228917907 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

228917907 is a deficient number, since it is larger than the sum of its proper divisors (113988293).

228917907 is an frugal number, since it uses more digits than its factorization.

228917907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942064 (or 942052 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 228917907 is about 15130.0332782185. The cubic root of 228917907 is about 611.7302011465.

The spelling of 228917907 in words is "two hundred twenty-eight million, nine hundred seventeen thousand, nine hundred seven".