4578440 has 32 divisors (see below), whose sum is σ = 10909080. Its totient is φ = 1723392.

The previous prime is 4578439. The next prime is 4578443. The reversal of 4578440 is 448754.

It can be written as a sum of positive squares in 4 ways, for example, as 4571044 + 7396 = 2138^2 + 86^2 .

It is a super-2 number, since 2×4578440² = 41924225667200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4578397 and 4578406.

It is not an unprimeable number, because it can be changed into a prime (4578443) 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, 2687 + ... + 4046.

Almost surely, 2^4578440 is an apocalyptic number.

4578440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4578440 is an abundant number, since it is smaller than the sum of its proper divisors (6330640).

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

4578440 is a wasteful number, since it uses less digits than its factorization.

4578440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6761 (or 6757 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 4578440 is about 2139.7289547978. The cubic root of 4578440 is about 166.0501130938.

The spelling of 4578440 in words is "four million, five hundred seventy-eight thousand, four hundred forty".