228375797778 has 54 divisors (see below), whose sum is σ = 502010705781. Its totient is φ = 75033794016.

The previous prime is 228375797731. The next prime is 228375797873. The reversal of 228375797778 is 877797573822.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 227325843369 + 1049954409 = 476787^2 + 32403^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=337917.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 148006875 + ... + 148008417.

Almost surely, 2^228375797778 is an apocalyptic number.

228375797778 is an abundant number, since it is smaller than the sum of its proper divisors (273634908003).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228375797778 is an frugal number, since it uses more digits than its factorization.

228375797778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3240 (or 1621 counting only the distinct ones).

The product of its digits is 580849920, while the sum is 72.

Multiplying 228375797778 by its sum of digits (72), we get a square (16443057440016 = 4055004²).

The spelling of 228375797778 in words is "two hundred twenty-eight billion, three hundred seventy-five million, seven hundred ninety-seven thousand, seven hundred seventy-eight".