308397397 has 32 divisors (see below), whose sum is σ = 400619520. Its totient is φ = 230354880.

The previous prime is 308397377. The next prime is 308397403. The reversal of 308397397 is 793793803.

It is not a de Polignac number, because 308397397 - 2²³ = 300008789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 308397397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308397377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 372498 + ... + 373324.

It is an arithmetic number, because the mean of its divisors is an integer number (12519360).

Almost surely, 2^308397397 is an apocalyptic number.

It is an amenable number.

308397397 is a deficient number, since it is larger than the sum of its proper divisors (92222123).

308397397 is a wasteful number, since it uses less digits than its factorization.

308397397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041.

The product of its (nonzero) digits is 857304, while the sum is 49.

The square root of 308397397 is about 17561.2470229195. The cubic root of 308397397 is about 675.6216655962.

The spelling of 308397397 in words is "three hundred eight million, three hundred ninety-seven thousand, three hundred ninety-seven".