4487440 has 20 divisors (see below), whose sum is σ = 10433484. Its totient is φ = 1794944.

The previous prime is 4487423. The next prime is 4487449. The reversal of 4487440 is 447844.

It can be written as a sum of positive squares in 2 ways, for example, as 1290496 + 3196944 = 1136^2 + 1788^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (4487449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27967 + ... + 28126.

Almost surely, 2^4487440 is an apocalyptic number.

4487440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4487440 is an abundant number, since it is smaller than the sum of its proper divisors (5946044).

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

4487440 is a wasteful number, since it uses less digits than its factorization.

4487440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56106 (or 56100 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 31.

The square root of 4487440 is about 2118.3578545657. The cubic root of 4487440 is about 164.9426185533.

The spelling of 4487440 in words is "four million, four hundred eighty-seven thousand, four hundred forty".