42204140 has 24 divisors (see below), whose sum is σ = 96686352. Its totient is φ = 15346880.

The previous prime is 42204137. The next prime is 42204179. The reversal of 42204140 is 4140224.

42204140 = 261² + 262² + ... + 524².

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95699 + ... + 96138.

It is an arithmetic number, because the mean of its divisors is an integer number (4028598).

Almost surely, 2^42204140 is an apocalyptic number.

It is an amenable number.

42204140 is an abundant number, since it is smaller than the sum of its proper divisors (54482212).

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

42204140 is a wasteful number, since it uses less digits than its factorization.

42204140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191857 (or 191855 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 42204140 is about 6496.4713498945. The cubic root of 42204140 is about 348.1649260088.

Adding to 42204140 its reverse (4140224), we get a palindrome (46344364).

The spelling of 42204140 in words is "forty-two million, two hundred four thousand, one hundred forty".