331649028 has 36 divisors (see below), whose sum is σ = 882459760. Its totient is φ = 104731056.

The previous prime is 331649027. The next prime is 331649057. The reversal of 331649028 is 820946133.

331649028 is a `hidden beast` number, since 3 + 3 + 1 + 649 + 0 + 2 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 331648983 and 331649001.

It is not an unprimeable number, because it can be changed into a prime (331649027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 241750 + ... + 243117.

Almost surely, 2^331649028 is an apocalyptic number.

331649028 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

331649028 is an abundant number, since it is smaller than the sum of its proper divisors (550810732).

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

331649028 is a wasteful number, since it uses less digits than its factorization.

331649028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484896 (or 484891 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 331649028 is about 18211.2335661262. The cubic root of 331649028 is about 692.1914697322.

The spelling of 331649028 in words is "three hundred thirty-one million, six hundred forty-nine thousand, twenty-eight".