397134738 has 320 divisors, whose sum is σ = 1248952320. Its totient is φ = 90979200.

The previous prime is 397134719. The next prime is 397134757. The reversal of 397134738 is 837431793.

It is an interprime number because it is at equal distance from previous prime (397134719) and next prime (397134757).

It is a junction number, because it is equal to n+sod(n) for n = 397134693 and 397134702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 5026983 + ... + 5027061.

It is an arithmetic number, because the mean of its divisors is an integer number (3902976).

Almost surely, 2^397134738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397134738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (624476160).

397134738 is an abundant number, since it is smaller than the sum of its proper divisors (851817582).

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

397134738 is a wasteful number, since it uses less digits than its factorization.

397134738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155 (or 146 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 397134738 is about 19928.2397115249. The cubic root of 397134738 is about 735.0427963419.

The spelling of 397134738 in words is "three hundred ninety-seven million, one hundred thirty-four thousand, seven hundred thirty-eight".