228722797 has 8 divisors (see below), whose sum is σ = 239853240. Its totient is φ = 217808640.

The previous prime is 228722783. The next prime is 228722801. The reversal of 228722797 is 797227822.

It can be written as a sum of positive squares in 4 ways, for example, as 41744521 + 186978276 = 6461^2 + 13674^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-228722797 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 (228722497) 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, 51904 + ... + 56137.

It is an arithmetic number, because the mean of its divisors is an integer number (29981655).

Almost surely, 2^228722797 is an apocalyptic number.

It is an amenable number.

228722797 is a deficient number, since it is larger than the sum of its proper divisors (11130443).

228722797 is a wasteful number, since it uses less digits than its factorization.

228722797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108143.

The product of its digits is 395136, while the sum is 46.

The square root of 228722797 is about 15123.5841320766. The cubic root of 228722797 is about 611.5563562859.

The spelling of 228722797 in words is "two hundred twenty-eight million, seven hundred twenty-two thousand, seven hundred ninety-seven".