240421404 has 12 divisors (see below), whose sum is σ = 560983304. Its totient is φ = 80140464.

The previous prime is 240421381. The next prime is 240421427. The reversal of 240421404 is 404124042.

It is an interprime number because it is at equal distance from previous prime (240421381) and next prime (240421427).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10017547 + ... + 10017570.

Almost surely, 2^240421404 is an apocalyptic number.

It is an amenable number.

240421404 is an abundant number, since it is smaller than the sum of its proper divisors (320561900).

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

240421404 is a wasteful number, since it uses less digits than its factorization.

240421404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20035124 (or 20035122 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 240421404 is about 15505.5281754605. The cubic root of 240421404 is about 621.8100107973.

Adding to 240421404 its reverse (404124042), we get a palindrome (644545446).

The spelling of 240421404 in words is "two hundred forty million, four hundred twenty-one thousand, four hundred four".