308243855 has 16 divisors (see below), whose sum is σ = 381573504. Its totient is φ = 238867200.

The previous prime is 308243849. The next prime is 308243857. The reversal of 308243855 is 558342803.

It is not a de Polignac number, because 308243855 - 2¹⁴ = 308227471 is a prime.

It is a super-2 number, since 2×308243855² = 190028548290522050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308243857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39530 + ... + 46680.

It is an arithmetic number, because the mean of its divisors is an integer number (23848344).

Almost surely, 2^308243855 is an apocalyptic number.

308243855 is a deficient number, since it is larger than the sum of its proper divisors (73329649).

308243855 is a wasteful number, since it uses less digits than its factorization.

308243855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7426.

The product of its (nonzero) digits is 115200, while the sum is 38.

The square root of 308243855 is about 17556.8748642804. The cubic root of 308243855 is about 675.5095229265.

The spelling of 308243855 in words is "three hundred eight million, two hundred forty-three thousand, eight hundred fifty-five".