401415440 has 40 divisors (see below), whose sum is σ = 940439808. Its totient is φ = 159336320.

The previous prime is 401415439. The next prime is 401415463. The reversal of 401415440 is 44514104.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×401415440² = 322268710940787200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8672 + ... + 29631.

Almost surely, 2^401415440 is an apocalyptic number.

401415440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401415440 is an abundant number, since it is smaller than the sum of its proper divisors (539024368).

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

401415440 is a wasteful number, since it uses less digits than its factorization.

401415440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38447 (or 38441 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 401415440 is about 20035.3547510395. The cubic root of 401415440 is about 737.6743642116.

Adding to 401415440 its reverse (44514104), we get a palindrome (445929544).

The spelling of 401415440 in words is "four hundred one million, four hundred fifteen thousand, four hundred forty".