345478020 has 24 divisors (see below), whose sum is σ = 967338624. Its totient is φ = 92127456.

The previous prime is 345477997. The next prime is 345478027. The reversal of 345478020 is 20874543.

It is not an unprimeable number, because it can be changed into a prime (345478027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2878924 + ... + 2879043.

It is an arithmetic number, because the mean of its divisors is an integer number (40305776).

Almost surely, 2^345478020 is an apocalyptic number.

345478020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

345478020 is an abundant number, since it is smaller than the sum of its proper divisors (621860604).

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

345478020 is a wasteful number, since it uses less digits than its factorization.

345478020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5757979 (or 5757977 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 345478020 is about 18587.0390326162. The cubic root of 345478020 is about 701.6816845659.

The spelling of 345478020 in words is "three hundred forty-five million, four hundred seventy-eight thousand, twenty".