401142440 has 32 divisors (see below), whose sum is σ = 950076000. Its totient is φ = 152011584.

The previous prime is 401142397. The next prime is 401142451. The reversal of 401142440 is 44241104.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 263150 + ... + 264669.

It is an arithmetic number, because the mean of its divisors is an integer number (29689875).

Almost surely, 2^401142440 is an apocalyptic number.

401142440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401142440 is an abundant number, since it is smaller than the sum of its proper divisors (548933560).

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

401142440 is a wasteful number, since it uses less digits than its factorization.

401142440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527849 (or 527845 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 401142440 is about 20028.5406358027. The cubic root of 401142440 is about 737.5070971260.

Adding to 401142440 its reverse (44241104), we get a palindrome (445383544).

It can be divided in two parts, 40 and 1142440, that multiplied together give a square (45697600 = 6760²).

The spelling of 401142440 in words is "four hundred one million, one hundred forty-two thousand, four hundred forty".