403281380 has 24 divisors (see below), whose sum is σ = 855625848. Its totient is φ = 159648768.

The previous prime is 403281353. The next prime is 403281383. The reversal of 403281380 is 83182304.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 25989604 + 377291776 = 5098^2 + 19424^2 .

It is not an unprimeable number, because it can be changed into a prime (403281383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101999 + ... + 105878.

It is an arithmetic number, because the mean of its divisors is an integer number (35651077).

Almost surely, 2^403281380 is an apocalyptic number.

It is an amenable number.

403281380 is an abundant number, since it is smaller than the sum of its proper divisors (452344468).

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

403281380 is a wasteful number, since it uses less digits than its factorization.

403281380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207983 (or 207981 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 403281380 is about 20081.8669450826. The cubic root of 403281380 is about 738.8155998522.

The spelling of 403281380 in words is "four hundred three million, two hundred eighty-one thousand, three hundred eighty".