397777256 has 8 divisors (see below), whose sum is σ = 745832370. Its totient is φ = 198888624.

The previous prime is 397777207. The next prime is 397777277. The reversal of 397777256 is 652777793.

It can be written as a sum of positive squares in only one way, i.e., 235622500 + 162154756 = 15350^2 + 12734^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 397777198 and 397777207.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24861071 + ... + 24861086.

Almost surely, 2^397777256 is an apocalyptic number.

It is an amenable number.

397777256 is a deficient number, since it is larger than the sum of its proper divisors (348055114).

397777256 is a wasteful number, since it uses less digits than its factorization.

397777256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49722163 (or 49722159 counting only the distinct ones).

The product of its digits is 3889620, while the sum is 53.

The square root of 397777256 is about 19944.3539880338. The cubic root of 397777256 is about 735.4389874527.

The spelling of 397777256 in words is "three hundred ninety-seven million, seven hundred seventy-seven thousand, two hundred fifty-six".