3109749720 has 192 divisors, whose sum is σ = 11839219200. Its totient is φ = 646168320.

The previous prime is 3109749677. The next prime is 3109749737. The reversal of 3109749720 is 279479013.

3109749720 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40641 + ... + 88719.

It is an arithmetic number, because the mean of its divisors is an integer number (61662600).

Almost surely, 2^3109749720 is an apocalyptic number.

3109749720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3109749720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5919609600).

3109749720 is an abundant number, since it is smaller than the sum of its proper divisors (8729469480).

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

3109749720 is a wasteful number, since it uses less digits than its factorization.

3109749720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48118 (or 48107 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 42.

The square root of 3109749720 is about 55765.1299648804. The cubic root of 3109749720 is about 1459.6267451420.

The spelling of 3109749720 in words is "three billion, one hundred nine million, seven hundred forty-nine thousand, seven hundred twenty".