2909193940 has 12 divisors (see below), whose sum is σ = 6109307316. Its totient is φ = 1163677568.

The previous prime is 2909193923. The next prime is 2909193971. The reversal of 2909193940 is 493919092.

It can be written as a sum of positive squares in 2 ways, for example, as 495240516 + 2413953424 = 22254^2 + 49132^2 .

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 3 ways as a sum of consecutive naturals, for example, 72729829 + ... + 72729868.

It is an arithmetic number, because the mean of its divisors is an integer number (509108943).

Almost surely, 2^2909193940 is an apocalyptic number.

2909193940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2909193940 is an abundant number, since it is smaller than the sum of its proper divisors (3200113376).

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

2909193940 is a wasteful number, since it uses less digits than its factorization.

2909193940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145459706 (or 145459704 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 46.

The square root of 2909193940 is about 53936.9441106928. The cubic root of 2909193940 is about 1427.5485637123.

The spelling of 2909193940 in words is "two billion, nine hundred nine million, one hundred ninety-three thousand, nine hundred forty".