401040120 has 64 divisors (see below), whose sum is σ = 1295673120. Its totient is φ = 98717184.

The previous prime is 401040089. The next prime is 401040179. The reversal of 401040120 is 21040104.

It is a super-2 number, since 2×401040120² = 321666355699228800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 401040096 and 401040105.

It is a congruent number.

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, 126979 + ... + 130098.

Almost surely, 2^401040120 is an apocalyptic number.

401040120 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401040120 is an abundant number, since it is smaller than the sum of its proper divisors (894633000).

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

401040120 is a wasteful number, since it uses less digits than its factorization.

401040120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257104 (or 257100 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 401040120 is about 20025.9861180417. The cubic root of 401040120 is about 737.4443861156. Note that the first 3 decimals are identical.

Adding to 401040120 its reverse (21040104), we get a palindrome (422080224).

The spelling of 401040120 in words is "four hundred one million, forty thousand, one hundred twenty".