331377128 has 8 divisors (see below), whose sum is σ = 621332130. Its totient is φ = 165688560.

The previous prime is 331377127. The next prime is 331377131. The reversal of 331377128 is 821773133.

It can be written as a sum of positive squares in only one way, i.e., 326958724 + 4418404 = 18082^2 + 2102^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (331377121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20711063 + ... + 20711078.

Almost surely, 2^331377128 is an apocalyptic number.

It is an amenable number.

331377128 is a deficient number, since it is larger than the sum of its proper divisors (289955002).

331377128 is a wasteful number, since it uses less digits than its factorization.

331377128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41422147 (or 41422143 counting only the distinct ones).

The product of its digits is 21168, while the sum is 35.

The square root of 331377128 is about 18203.7668629325. The cubic root of 331377128 is about 692.0022553303.

The spelling of 331377128 in words is "three hundred thirty-one million, three hundred seventy-seven thousand, one hundred twenty-eight".