3909497720 has 32 divisors (see below), whose sum is σ = 8809737120. Its totient is φ = 1561422720.

The previous prime is 3909497629. The next prime is 3909497729. The reversal of 3909497720 is 277949093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3909497729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47492 + ... + 100371.

It is an arithmetic number, because the mean of its divisors is an integer number (275304285).

Almost surely, 2^3909497720 is an apocalyptic number.

It is an amenable number.

3909497720 is an abundant number, since it is smaller than the sum of its proper divisors (4900239400).

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

3909497720 is a wasteful number, since it uses less digits than its factorization.

3909497720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148535 (or 148531 counting only the distinct ones).

The product of its (nonzero) digits is 857304, while the sum is 50.

The square root of 3909497720 is about 62525.9763618290. The cubic root of 3909497720 is about 1575.3376576806.

The spelling of 3909497720 in words is "three billion, nine hundred nine million, four hundred ninety-seven thousand, seven hundred twenty".