3121420440 has 64 divisors (see below), whose sum is σ = 9387992160. Its totient is φ = 830269440.

The previous prime is 3121420427. The next prime is 3121420457. The reversal of 3121420440 is 440241213.

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 15 ways as a sum of consecutive naturals, for example, 14880 + ... + 80400.

Almost surely, 2^3121420440 is an apocalyptic number.

3121420440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3121420440 is an abundant number, since it is smaller than the sum of its proper divisors (6266571720).

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

3121420440 is a wasteful number, since it uses less digits than its factorization.

3121420440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65932 (or 65928 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 3121420440 is about 55869.6737058666. The cubic root of 3121420440 is about 1461.4504319933.

Adding to 3121420440 its reverse (440241213), we get a palindrome (3561661653).

The spelling of 3121420440 in words is "three billion, one hundred twenty-one million, four hundred twenty thousand, four hundred forty".