397758 has 8 divisors (see below), whose sum is σ = 795528. Its totient is φ = 132584.

The previous prime is 397757. The next prime is 397759. The reversal of 397758 is 857793.

It is an interprime number because it is at equal distance from previous prime (397757) and next prime (397759).

It is a sphenic number, since it is the product of 3 distinct primes.

397758 is an admirable number.

It is a super-2 number, since 2×397758² = 316422853128, which contains 22 as substring.

It is a Curzon number.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397751) 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, 33141 + ... + 33152.

It is an arithmetic number, because the mean of its divisors is an integer number (99441).

2³⁹⁷⁷⁵⁸ is an apocalyptic number.

397758 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

397758 is a wasteful number, since it uses less digits than its factorization.

397758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66298.

The product of its digits is 52920, while the sum is 39.

The square root of 397758 is about 630.6805847654. The cubic root of 397758 is about 73.5427119972.

The spelling of 397758 in words is "three hundred ninety-seven thousand, seven hundred fifty-eight".