4000290 has 64 divisors (see below), whose sum is σ = 11252736. Its totient is φ = 891072.

The previous prime is 4000277. The next prime is 4000291. The reversal of 4000290 is 920004.

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

It is not an unprimeable number, because it can be changed into a prime (4000291) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8809 + ... + 9251.

It is an arithmetic number, because the mean of its divisors is an integer number (175824).

Almost surely, 2^4000290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4000290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5626368).

4000290 is an abundant number, since it is smaller than the sum of its proper divisors (7252446).

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

4000290 is a wasteful number, since it uses less digits than its factorization.

4000290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503.

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

The square root of 4000290 is about 2000.0724986860. The cubic root of 4000290 is about 158.7439413233.

Adding to 4000290 its reverse (920004), we get a palindrome (4920294).

The spelling of 4000290 in words is "four million, two hundred ninety", and thus it is an aban number.