331869780 has 72 divisors (see below), whose sum is σ = 1098193824. Its totient is φ = 80452800.

The previous prime is 331869779. The next prime is 331869799. The reversal of 331869780 is 87968133.

It is a happy number.

It is a super-2 number, since 2×331869780² = 220275101754496800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81826 + ... + 85785.

It is an arithmetic number, because the mean of its divisors is an integer number (15252692).

Almost surely, 2^331869780 is an apocalyptic number.

331869780 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

331869780 is an abundant number, since it is smaller than the sum of its proper divisors (766324044).

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

331869780 is a wasteful number, since it uses less digits than its factorization.

331869780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167637 (or 167632 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 331869780 is about 18217.2934323406. The cubic root of 331869780 is about 692.3450143412.

The spelling of 331869780 in words is "three hundred thirty-one million, eight hundred sixty-nine thousand, seven hundred eighty".