308729652 has 96 divisors (see below), whose sum is σ = 917360640. Its totient is φ = 78472320.

The previous prime is 308729647. The next prime is 308729653. The reversal of 308729652 is 256927803.

It is a super-2 number, since 2×308729652² = 190627996048082208, which contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308729653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39874 + ... + 46982.

It is an arithmetic number, because the mean of its divisors is an integer number (9555840).

Almost surely, 2^308729652 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 308729652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (458680320).

308729652 is an abundant number, since it is smaller than the sum of its proper divisors (608630988).

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

308729652 is a wasteful number, since it uses less digits than its factorization.

308729652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7181 (or 7179 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 308729652 is about 17570.7043683513. The cubic root of 308729652 is about 675.8642077535.

The spelling of 308729652 in words is "three hundred eight million, seven hundred twenty-nine thousand, six hundred fifty-two".