404211240 has 96 divisors (see below), whose sum is σ = 1325867400. Its totient is φ = 106790400.

The previous prime is 404211229. The next prime is 404211253. The reversal of 404211240 is 42112404.

404211240 is a `hidden beast` number, since 4 + 0 + 421 + 1 + 240 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 402323364 + 1887876 = 20058^2 + 1374^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34090 + ... + 44390.

Almost surely, 2^404211240 is an apocalyptic number.

404211240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 404211240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (662933700).

404211240 is an abundant number, since it is smaller than the sum of its proper divisors (921656160).

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

404211240 is a wasteful number, since it uses less digits than its factorization.

404211240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10427 (or 10420 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 404211240 is about 20105.0053469279. The cubic root of 404211240 is about 739.3830016495.

Adding to 404211240 its reverse (42112404), we get a palindrome (446323644).

The spelling of 404211240 in words is "four hundred four million, two hundred eleven thousand, two hundred forty".