305321420 has 24 divisors (see below), whose sum is σ = 643740048. Its totient is φ = 121640000.

The previous prime is 305321407. The next prime is 305321437. The reversal of 305321420 is 24123503.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 305321392 and 305321401.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25391 + ... + 35430.

It is an arithmetic number, because the mean of its divisors is an integer number (26822502).

Almost surely, 2^305321420 is an apocalyptic number.

It is an amenable number.

305321420 is an abundant number, since it is smaller than the sum of its proper divisors (338418628).

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

305321420 is a wasteful number, since it uses less digits than its factorization.

305321420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61081 (or 61079 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 305321420 is about 17473.4490012705. The cubic root of 305321420 is about 673.3679234809.

Adding to 305321420 its reverse (24123503), we get a palindrome (329444923).

The spelling of 305321420 in words is "three hundred five million, three hundred twenty-one thousand, four hundred twenty".