309048 has 32 divisors (see below), whose sum is σ = 787200. Its totient is φ = 101088.

The previous prime is 309037. The next prime is 309059. The reversal of 309048 is 840903.

It is an interprime number because it is at equal distance from previous prime (309037) and next prime (309059).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 309048.

It is an unprimeable number.

309048 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1815 + ... + 1977.

It is an arithmetic number, because the mean of its divisors is an integer number (24600).

2³⁰⁹⁰⁴⁸ is an apocalyptic number.

It is an amenable number.

309048 is an abundant number, since it is smaller than the sum of its proper divisors (478152).

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

309048 is a wasteful number, since it uses less digits than its factorization.

309048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 309048 is about 555.9208576767. The cubic root of 309048 is about 67.6096434779.

The spelling of 309048 in words is "three hundred nine thousand, forty-eight".