401434220 has 24 divisors (see below), whose sum is σ = 919649808. Its totient is φ = 145976000.

The previous prime is 401434207. The next prime is 401434259. The reversal of 401434220 is 22434104.

It is a super-2 number, since 2×401434220² = 322298865974016800, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 401434192 and 401434201.

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, 912131 + ... + 912570.

It is an arithmetic number, because the mean of its divisors is an integer number (38318742).

Almost surely, 2^401434220 is an apocalyptic number.

It is an amenable number.

401434220 is an abundant number, since it is smaller than the sum of its proper divisors (518215588).

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

401434220 is a wasteful number, since it uses less digits than its factorization.

401434220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824721 (or 1824719 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 401434220 is about 20035.8234170697. The cubic root of 401434220 is about 737.6858679283.

Adding to 401434220 its reverse (22434104), we get a palindrome (423868324).

The spelling of 401434220 in words is "four hundred one million, four hundred thirty-four thousand, two hundred twenty".