405142044 has 24 divisors (see below), whose sum is σ = 967317120. Its totient is φ = 131906544.

The previous prime is 405142039. The next prime is 405142051. The reversal of 405142044 is 440241504.

It is a happy number.

It is a congruent number.

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, 392064 + ... + 393095.

It is an arithmetic number, because the mean of its divisors is an integer number (40304880).

Almost surely, 2^405142044 is an apocalyptic number.

It is an amenable number.

405142044 is an abundant number, since it is smaller than the sum of its proper divisors (562175076).

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

405142044 is a wasteful number, since it uses less digits than its factorization.

405142044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785209 (or 785207 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 405142044 is about 20128.1405996679. The cubic root of 405142044 is about 739.9501086403.

Adding to 405142044 its reverse (440241504), we get a palindrome (845383548).

The spelling of 405142044 in words is "four hundred five million, one hundred forty-two thousand, forty-four".