478923440 has 40 divisors (see below), whose sum is σ = 1123923600. Its totient is φ = 189775616.

The previous prime is 478923427. The next prime is 478923461. The reversal of 478923440 is 44329874.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×478923440² = 458735322762867200, which contains 22 as substring.

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, 19415 + ... + 36534.

It is an arithmetic number, because the mean of its divisors is an integer number (28098090).

Almost surely, 2^478923440 is an apocalyptic number.

478923440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

478923440 is an abundant number, since it is smaller than the sum of its proper divisors (645000160).

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

478923440 is a wasteful number, since it uses less digits than its factorization.

478923440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56069 (or 56063 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 41.

The square root of 478923440 is about 21884.3195005008. The cubic root of 478923440 is about 782.3877303568.

The spelling of 478923440 in words is "four hundred seventy-eight million, nine hundred twenty-three thousand, four hundred forty".