404242434 has 32 divisors (see below), whose sum is σ = 937376640. Its totient is φ = 128888496.

The previous prime is 404242409. The next prime is 404242459. The reversal of 404242434 is 434242404.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (404242409) and next prime (404242459).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 404242398 and 404242407.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161497 + ... + 163980.

It is an arithmetic number, because the mean of its divisors is an integer number (29293020).

Almost surely, 2^404242434 is an apocalyptic number.

404242434 is an abundant number, since it is smaller than the sum of its proper divisors (533134206).

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

404242434 is a wasteful number, since it uses less digits than its factorization.

404242434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325511 (or 325505 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 27.

The square root of 404242434 is about 20105.7811089249. The cubic root of 404242434 is about 739.4020211768.

Adding to 404242434 its reverse (434242404), we get a palindrome (838484838).

The spelling of 404242434 in words is "four hundred four million, two hundred forty-two thousand, four hundred thirty-four".