305478 has 16 divisors (see below), whose sum is σ = 678960. Its totient is φ = 101808.

The previous prime is 305477. The next prime is 305479. The reversal of 305478 is 874503.

It is an interprime number because it is at equal distance from previous prime (305477) and next prime (305479).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2775 + ... + 2882.

It is an arithmetic number, because the mean of its divisors is an integer number (42435).

2³⁰⁵⁴⁷⁸ is an apocalyptic number.

305478 is an abundant number, since it is smaller than the sum of its proper divisors (373482).

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

305478 is a wasteful number, since it uses less digits than its factorization.

305478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5668 (or 5662 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 305478 is about 552.7006423011. The cubic root of 305478 is about 67.3483013049.

The spelling of 305478 in words is "three hundred five thousand, four hundred seventy-eight".