4487778 has 32 divisors (see below), whose sum is σ = 10221120. Its totient is φ = 1458720.

The previous prime is 4487761. The next prime is 4487789. The reversal of 4487778 is 8777844.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1201 + ... + 3227.

It is an arithmetic number, because the mean of its divisors is an integer number (319410).

Almost surely, 2^4487778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4487778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5110560).

4487778 is an abundant number, since it is smaller than the sum of its proper divisors (5733342).

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

4487778 is a wasteful number, since it uses less digits than its factorization.

4487778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2079 (or 2073 counting only the distinct ones).

The product of its digits is 351232, while the sum is 45.

The square root of 4487778 is about 2118.4376318410. The cubic root of 4487778 is about 164.9467596824.

The spelling of 4487778 in words is "four million, four hundred eighty-seven thousand, seven hundred seventy-eight".