40143204 has 18 divisors (see below), whose sum is σ = 101473190. Its totient is φ = 13381056.

The previous prime is 40143197. The next prime is 40143227. The reversal of 40143204 is 40234104.

It can be written as a sum of positive squares in only one way, i.e., 38937600 + 1205604 = 6240^2 + 1098^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×40143204² = 3222953654771232, which contains 22 as substring.

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 5 ways as a sum of consecutive naturals, for example, 557509 + ... + 557580.

Almost surely, 2^40143204 is an apocalyptic number.

It is an amenable number.

40143204 is an abundant number, since it is smaller than the sum of its proper divisors (61329986).

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

40143204 is a wasteful number, since it uses less digits than its factorization.

40143204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115099 (or 1115094 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 40143204 is about 6335.8664758658. The cubic root of 40143204 is about 342.4028289173.

Adding to 40143204 its reverse (40234104), we get a palindrome (80377308).

The spelling of 40143204 in words is "forty million, one hundred forty-three thousand, two hundred four".