420004044 has 36 divisors (see below), whose sum is σ = 1117556440. Its totient is φ = 132632640.

The previous prime is 420004043. The next prime is 420004061. The reversal of 420004044 is 440400024.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is not an unprimeable number, because it can be changed into a prime (420004043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 306337 + ... + 307704.

Almost surely, 2^420004044 is an apocalyptic number.

It is an amenable number.

420004044 is an abundant number, since it is smaller than the sum of its proper divisors (697552396).

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

420004044 is a wasteful number, since it uses less digits than its factorization.

420004044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614070 (or 614065 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 420004044 is about 20494.0001951791. Note that the first 3 decimals coincide. The cubic root of 420004044 is about 748.8896422856.

Adding to 420004044 its reverse (440400024), we get a palindrome (860404068).

The spelling of 420004044 in words is "four hundred twenty million, four thousand, forty-four".