331909940 has 24 divisors (see below), whose sum is σ = 697358592. Its totient is φ = 132697760.

The previous prime is 331909933. The next prime is 331909969. The reversal of 331909940 is 49909133.

It is a super-2 number, since 2×331909940² = 220328416541607200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 331909894 and 331909903.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 65705 + ... + 70575.

It is an arithmetic number, because the mean of its divisors is an integer number (29056608).

Almost surely, 2^331909940 is an apocalyptic number.

It is an amenable number.

331909940 is an abundant number, since it is smaller than the sum of its proper divisors (365448652).

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

331909940 is a wasteful number, since it uses less digits than its factorization.

331909940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8287 (or 8285 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 331909940 is about 18218.3956483550. The cubic root of 331909940 is about 692.3729404094.

The spelling of 331909940 in words is "three hundred thirty-one million, nine hundred nine thousand, nine hundred forty".