4052290 has 48 divisors (see below), whose sum is σ = 8532216. Its totient is φ = 1379840.

The previous prime is 4052261. The next prime is 4052299. The reversal of 4052290 is 922504.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4052169 + 121 = 2013^2 + 11^2 .

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (4052299) 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, 20472 + ... + 20668.

Almost surely, 2^4052290 is an apocalyptic number.

4052290 is an abundant number, since it is smaller than the sum of its proper divisors (4479926).

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

4052290 is a wasteful number, since it uses less digits than its factorization.

4052290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 4052290 is about 2013.0300544205. The cubic root of 4052290 is about 159.4288227800.

Adding to 4052290 its reverse (922504), we get a palindrome (4974794).

The spelling of 4052290 in words is "four million, fifty-two thousand, two hundred ninety".