400004488 has 16 divisors (see below), whose sum is σ = 807701580. Its totient is φ = 184617408.

The previous prime is 400004471. The next prime is 400004489. The reversal of 400004488 is 884400004.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 386594244 + 13410244 = 19662^2 + 3662^2 .

It is not an unprimeable number, because it can be changed into a prime (400004489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1922995 + ... + 1923202.

Almost surely, 2^400004488 is an apocalyptic number.

It is an amenable number.

400004488 is an abundant number, since it is smaller than the sum of its proper divisors (407697092).

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

400004488 is a wasteful number, since it uses less digits than its factorization.

400004488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3846216 (or 3846212 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

The square root of 400004488 is about 20000.1121996853. The cubic root of 400004488 is about 736.8090553733.

The spelling of 400004488 in words is "four hundred million, four thousand, four hundred eighty-eight".