397491185 has 48 divisors (see below), whose sum is σ = 613879056. Its totient is φ = 244726272.

The previous prime is 397491179. The next prime is 397491209. The reversal of 397491185 is 581194793.

It can be written as a sum of positive squares in 8 ways, for example, as 35236096 + 362255089 = 5936^2 + 19033^2 .

It is not a de Polignac number, because 397491185 - 2¹⁰ = 397490161 is a prime.

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, 116159 + ... + 119531.

It is an arithmetic number, because the mean of its divisors is an integer number (12789147).

Almost surely, 2^397491185 is an apocalyptic number.

397491185 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

397491185 is a deficient number, since it is larger than the sum of its proper divisors (216387871).

397491185 is a wasteful number, since it uses less digits than its factorization.

397491185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3442 (or 3435 counting only the distinct ones).

The product of its digits is 272160, while the sum is 47.

The square root of 397491185 is about 19937.1809692343. The cubic root of 397491185 is about 735.2626423427.

It can be divided in two parts, 3974 and 91185, that added together give a palindrome (95159).

The spelling of 397491185 in words is "three hundred ninety-seven million, four hundred ninety-one thousand, one hundred eighty-five".