397246278 has 64 divisors (see below), whose sum is σ = 946681344. Its totient is φ = 109536000.

The previous prime is 397246277. The next prime is 397246279. The reversal of 397246278 is 872642793.

It is an interprime number because it is at equal distance from previous prime (397246277) and next prime (397246279).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397246277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57658 + ... + 64178.

It is an arithmetic number, because the mean of its divisors is an integer number (14791896).

Almost surely, 2^397246278 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397246278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (473340672).

397246278 is an abundant number, since it is smaller than the sum of its proper divisors (549435066).

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

397246278 is a wasteful number, since it uses less digits than its factorization.

397246278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6621.

The product of its digits is 1016064, while the sum is 48.

The square root of 397246278 is about 19931.0380562579. The cubic root of 397246278 is about 735.1116050620. Note that the first 3 decimals are identical.

The spelling of 397246278 in words is "three hundred ninety-seven million, two hundred forty-six thousand, two hundred seventy-eight".