4385040 has 120 divisors (see below), whose sum is σ = 15040704. Its totient is φ = 1056000.

The previous prime is 4385027. The next prime is 4385041. The reversal of 4385040 is 405834.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 4385040.

It is not an unprimeable number, because it can be changed into a prime (4385041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28965 + ... + 29115.

Almost surely, 2^4385040 is an apocalyptic number.

4385040 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 4385040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7520352).

4385040 is an abundant number, since it is smaller than the sum of its proper divisors (10655664).

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

4385040 is a wasteful number, since it uses less digits than its factorization.

4385040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 4385040 is about 2094.0487100352. The cubic root of 4385040 is about 163.6783304258.

4385040 divided by its sum of digits (24) gives a triangular number (182710 = T₆₀₄).

The spelling of 4385040 in words is "four million, three hundred eighty-five thousand, forty".