228378797 has 4 divisors (see below), whose sum is σ = 228514140. Its totient is φ = 228243456.

The previous prime is 228378791. The next prime is 228378817. The reversal of 228378797 is 797873822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 797873822 = 2 ⋅398936911.

It can be written as a sum of positive squares in 2 ways, for example, as 68128516 + 160250281 = 8254^2 + 12659^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228378797 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 (228378791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65108 + ... + 68525.

It is an arithmetic number, because the mean of its divisors is an integer number (57128535).

Almost surely, 2^228378797 is an apocalyptic number.

It is an amenable number.

228378797 is a deficient number, since it is larger than the sum of its proper divisors (135343).

228378797 is a wasteful number, since it uses less digits than its factorization.

228378797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135342.

The product of its digits is 2370816, while the sum is 53.

The square root of 228378797 is about 15112.2068871492. The cubic root of 228378797 is about 611.2496080503.

The spelling of 228378797 in words is "two hundred twenty-eight million, three hundred seventy-eight thousand, seven hundred ninety-seven".