401242040 has 16 divisors (see below), whose sum is σ = 902794680. Its totient is φ = 160496800.

The previous prime is 401242033. The next prime is 401242063. The reversal of 401242040 is 40242104.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5015486 + ... + 5015565.

Almost surely, 2^401242040 is an apocalyptic number.

401242040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401242040 is an abundant number, since it is smaller than the sum of its proper divisors (501552640).

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

401242040 is a wasteful number, since it uses less digits than its factorization.

401242040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10031062 (or 10031058 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 401242040 is about 20031.0269332354. The cubic root of 401242040 is about 737.5681308312.

Adding to 401242040 its reverse (40242104), we get a palindrome (441484144).

The spelling of 401242040 in words is "four hundred one million, two hundred forty-two thousand, forty".