305423540 has 24 divisors (see below), whose sum is σ = 650426112. Its totient is φ = 120448160.

The previous prime is 305423507. The next prime is 305423543. The reversal of 305423540 is 45324503.

It is a super-2 number, since 2×305423540² = 186567077572263200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305423543) 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, 106124 + ... + 108963.

It is an arithmetic number, because the mean of its divisors is an integer number (27101088).

Almost surely, 2^305423540 is an apocalyptic number.

It is an amenable number.

305423540 is an abundant number, since it is smaller than the sum of its proper divisors (345002572).

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

305423540 is a wasteful number, since it uses less digits than its factorization.

305423540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215167 (or 215165 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 305423540 is about 17476.3709047388. The cubic root of 305423540 is about 673.4429882736.

The spelling of 305423540 in words is "three hundred five million, four hundred twenty-three thousand, five hundred forty".