305478145 has 32 divisors (see below), whose sum is σ = 430230528. Its totient is φ = 203877888.

The previous prime is 305478127. The next prime is 305478163. The reversal of 305478145 is 541874503.

It is an interprime number because it is at equal distance from previous prime (305478127) and next prime (305478163).

It is a cyclic number.

It is not a de Polignac number, because 305478145 - 2²¹ = 303380993 is a prime.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 382887 + ... + 383683.

It is an arithmetic number, because the mean of its divisors is an integer number (13444704).

Almost surely, 2^305478145 is an apocalyptic number.

305478145 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

305478145 is a deficient number, since it is larger than the sum of its proper divisors (124752383).

305478145 is a wasteful number, since it uses less digits than its factorization.

305478145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089.

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 305478145 is about 17477.9330871817. The cubic root of 305478145 is about 673.4831196085.

The spelling of 305478145 in words is "three hundred five million, four hundred seventy-eight thousand, one hundred forty-five".