655228388 has 12 divisors (see below), whose sum is σ = 1146875772. Its totient is φ = 327549600.

The previous prime is 655228381. The next prime is 655228391. The reversal of 655228388 is 883822556.

It can be written as a sum of positive squares in 2 ways, for example, as 217916644 + 437311744 = 14762^2 + 20912^2 .

It is not an unprimeable number, because it can be changed into a prime (655228381) 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, 12206 + ... + 38202.

It is an arithmetic number, because the mean of its divisors is an integer number (95572981).

Almost surely, 2^655228388 is an apocalyptic number.

It is an amenable number.

655228388 is a deficient number, since it is larger than the sum of its proper divisors (491647384).

655228388 is a wasteful number, since it uses less digits than its factorization.

655228388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32302 (or 32300 counting only the distinct ones).

The product of its digits is 921600, while the sum is 47.

The square root of 655228388 is about 25597.4293240552. The cubic root of 655228388 is about 868.5554872699. Note that the first 3 decimals are identical.

The spelling of 655228388 in words is "six hundred fifty-five million, two hundred twenty-eight thousand, three hundred eighty-eight".