331377280 has 64 divisors (see below), whose sum is σ = 853158600. Its totient is φ = 122351616.

The previous prime is 331377239. The next prime is 331377281. The reversal of 331377280 is 82773133.

It can be written as a sum of positive squares in 4 ways, for example, as 283046976 + 48330304 = 16824^2 + 6952^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (331377281) 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, 11595 + ... + 28234.

Almost surely, 2^331377280 is an apocalyptic number.

It is an amenable number.

331377280 is an abundant number, since it is smaller than the sum of its proper divisors (521781320).

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

331377280 is a wasteful number, since it uses less digits than its factorization.

331377280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39861 (or 39849 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 331377280 is about 18203.7710378921. The cubic root of 331377280 is about 692.0023611355.

The spelling of 331377280 in words is "three hundred thirty-one million, three hundred seventy-seven thousand, two hundred eighty".