308213136 has 405 divisors, whose sum is σ = 1164009483. Its totient is φ = 75841920.

The previous prime is 308213093. The next prime is 308213153. The reversal of 308213136 is 631312803.

It is a happy number.

The square root of 308213136 is 17556.

It is a perfect power (a square), and thus also a powerful number.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 16221735 + ... + 16221753.

Almost surely, 2^308213136 is an apocalyptic number.

308213136 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

308213136 is the 17556-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 308213136

308213136 is an abundant number, since it is smaller than the sum of its proper divisors (855796347).

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

308213136 is a wasteful number, since it uses less digits than its factorization.

308213136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88 (or 42 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The cubic root of 308213136 is about 675.4870821802.

Adding to 308213136 its reverse (631312803), we get a palindrome (939525939).

It can be divided in two parts, 308 and 213136, that added together give a square (213444 = 462²).

The spelling of 308213136 in words is "three hundred eight million, two hundred thirteen thousand, one hundred thirty-six".