397295766 has 96 divisors (see below), whose sum is σ = 1055658240. Its totient is φ = 109571616.

The previous prime is 397295749. The next prime is 397295779. The reversal of 397295766 is 667592793.

397295766 is a nontrivial binomial coefficient, being equal to C(28189, 2).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 96645 + ... + 100671.

It is an arithmetic number, because the mean of its divisors is an integer number (10996440).

Almost surely, 2^397295766 is an apocalyptic number.

397295766 is the 28188-th triangular number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397295766, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (527829120).

397295766 is an abundant number, since it is smaller than the sum of its proper divisors (658362474).

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

397295766 is a wasteful number, since it uses less digits than its factorization.

397295766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4080 (or 4068 counting only the distinct ones).

The product of its digits is 4286520, while the sum is 54.

The square root of 397295766 is about 19932.2794983414. The cubic root of 397295766 is about 735.1421299484.

The spelling of 397295766 in words is "three hundred ninety-seven million, two hundred ninety-five thousand, seven hundred sixty-six".