308689542 has 80 divisors (see below), whose sum is σ = 832170240. Its totient is φ = 83549232.

The previous prime is 308689541. The next prime is 308689547. The reversal of 308689542 is 245986803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308689541) 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 39 ways as a sum of consecutive naturals, for example, 14383 + ... + 28709.

It is an arithmetic number, because the mean of its divisors is an integer number (10402128).

Almost surely, 2^308689542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 308689542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (416085120).

308689542 is an abundant number, since it is smaller than the sum of its proper divisors (523480698).

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

308689542 is a wasteful number, since it uses less digits than its factorization.

308689542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14367 (or 14358 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 308689542 is about 17569.5629427712. The cubic root of 308689542 is about 675.8349371740.

The spelling of 308689542 in words is "three hundred eight million, six hundred eighty-nine thousand, five hundred forty-two".