4387920 has 80 divisors (see below), whose sum is σ = 13927680. Its totient is φ = 1142272.

The previous prime is 4387919. The next prime is 4387931. The reversal of 4387920 is 297834.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

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, 11086 + ... + 11474.

It is an arithmetic number, because the mean of its divisors is an integer number (174096).

Almost surely, 2^4387920 is an apocalyptic number.

4387920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4387920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6963840).

4387920 is an abundant number, since it is smaller than the sum of its proper divisors (9539760).

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

4387920 is a wasteful number, since it uses less digits than its factorization.

4387920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452 (or 446 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 4387920 is about 2094.7362602485. The cubic root of 4387920 is about 163.7141560533.

The spelling of 4387920 in words is "four million, three hundred eighty-seven thousand, nine hundred twenty".