4009020 has 48 divisors (see below), whose sum is σ = 11346720. Its totient is φ = 1057536.

The previous prime is 4009007. The next prime is 4009037. The reversal of 4009020 is 209004.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 6234 + ... + 6846.

It is an arithmetic number, because the mean of its divisors is an integer number (236390).

Almost surely, 2^4009020 is an apocalyptic number.

4009020 is the 1635-th pentagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4009020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5673360).

4009020 is an abundant number, since it is smaller than the sum of its proper divisors (7337700).

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

4009020 is a wasteful number, since it uses less digits than its factorization.

4009020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734 (or 732 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 4009020 is about 2002.2537301751. The cubic root of 4009020 is about 158.8593352662.

The spelling of 4009020 in words is "four million, nine thousand, twenty".