307428 has 48 divisors (see below), whose sum is σ = 834624. Its totient is φ = 87040.

The previous prime is 307423. The next prime is 307451. The reversal of 307428 is 824703.

307428 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 307398 and 307407.

It is not an unprimeable number, because it can be changed into a prime (307423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2176 + ... + 2312.

It is an arithmetic number, because the mean of its divisors is an integer number (17388).

2³⁰⁷⁴²⁸ 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 307428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (417312).

307428 is an abundant number, since it is smaller than the sum of its proper divisors (527196).

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

307428 is a wasteful number, since it uses less digits than its factorization.

307428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 307428 is about 554.4619013061. The cubic root of 307428 is about 67.4913020342.

The spelling of 307428 in words is "three hundred seven thousand, four hundred twenty-eight".