397766288 has 20 divisors (see below), whose sum is σ = 777745980. Its totient is φ = 197057664.

The previous prime is 397766287. The next prime is 397766309. The reversal of 397766288 is 882667793.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 100962304 + 296803984 = 10048^2 + 17228^2 .

It is not an unprimeable number, because it can be changed into a prime (397766287) 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, 112295 + ... + 115782.

It is an arithmetic number, because the mean of its divisors is an integer number (38887299).

Almost surely, 2^397766288 is an apocalyptic number.

It is an amenable number.

397766288 is a deficient number, since it is larger than the sum of its proper divisors (379979692).

397766288 is a wasteful number, since it uses less digits than its factorization.

397766288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228194 (or 228188 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 56.

The square root of 397766288 is about 19944.0790211030. The cubic root of 397766288 is about 735.4322279168.

It can be divided in two parts, 39776 and 6288, that added together give a palindrome (46064).

The spelling of 397766288 in words is "three hundred ninety-seven million, seven hundred sixty-six thousand, two hundred eighty-eight".