228725397 has 16 divisors (see below), whose sum is σ = 339842880. Its totient is φ = 152037936.

The previous prime is 228725389. The next prime is 228725443. The reversal of 228725397 is 793527822.

It is not a de Polignac number, because 228725397 - 2³ = 228725389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228725377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2838 + ... + 21575.

It is an arithmetic number, because the mean of its divisors is an integer number (21240180).

Almost surely, 2^228725397 is an apocalyptic number.

228725397 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

228725397 is a deficient number, since it is larger than the sum of its proper divisors (111117483).

228725397 is a wasteful number, since it uses less digits than its factorization.

228725397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24769 (or 24763 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 228725397 is about 15123.6700902922. The cubic root of 228725397 is about 611.5586735604.

The spelling of 228725397 in words is "two hundred twenty-eight million, seven hundred twenty-five thousand, three hundred ninety-seven".