309474048 has 144 divisors (see below), whose sum is σ = 897397760. Its totient is φ = 94113792.

The previous prime is 309474037. The next prime is 309474059. The reversal of 309474048 is 840474903.

It is an interprime number because it is at equal distance from previous prime (309474037) and next prime (309474059).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 309473997 and 309474015.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1387665 + ... + 1387887.

Almost surely, 2^309474048 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 309474048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (448698880).

309474048 is an abundant number, since it is smaller than the sum of its proper divisors (587923712).

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

309474048 is a wasteful number, since it uses less digits than its factorization.

309474048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394 (or 380 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 309474048 is about 17591.8744879561. The cubic root of 309474048 is about 676.4069769051.

The spelling of 309474048 in words is "three hundred nine million, four hundred seventy-four thousand, forty-eight".