1401404220 has 48 divisors (see below), whose sum is σ = 4359925920. Its totient is φ = 373707648.

The previous prime is 1401404209. The next prime is 1401404243. The reversal of 1401404220 is 224041041.

1401404220 is a `hidden beast` number, since 1 + 40 + 1 + 404 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1401404193 and 1401404202.

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, 1297057 + ... + 1298136.

It is an arithmetic number, because the mean of its divisors is an integer number (90831790).

Almost surely, 2^1401404220 is an apocalyptic number.

1401404220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1401404220 is an abundant number, since it is smaller than the sum of its proper divisors (2958521700).

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

1401404220 is a wasteful number, since it uses less digits than its factorization.

1401404220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2595211 (or 2595203 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1401404220 is about 37435.3338438433. Note that the first 3 decimals coincide. The cubic root of 1401404220 is about 1119.0628374318.

Adding to 1401404220 its reverse (224041041), we get a palindrome (1625445261).

The spelling of 1401404220 in words is "one billion, four hundred one million, four hundred four thousand, two hundred twenty".