4023090 has 24 divisors (see below), whose sum is σ = 10460268. Its totient is φ = 1072800.

The previous prime is 4023053. The next prime is 4023109. The reversal of 4023090 is 903204.

It can be written as a sum of positive squares in 2 ways, for example, as 3229209 + 793881 = 1797^2 + 891^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22261 + ... + 22440.

Almost surely, 2^4023090 is an apocalyptic number.

4023090 is an abundant number, since it is smaller than the sum of its proper divisors (6437178).

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

4023090 is a wasteful number, since it uses less digits than its factorization.

4023090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44714 (or 44711 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 4023090 is about 2005.7641935183. The cubic root of 4023090 is about 159.0449617714.

Adding to 4023090 its reverse (903204), we get a palindrome (4926294).

The spelling of 4023090 in words is "four million, twenty-three thousand, ninety".