4051720908 has 72 divisors (see below), whose sum is σ = 10855851552. Its totient is φ = 1269775872.

The previous prime is 4051720903. The next prime is 4051720909. The reversal of 4051720908 is 8090271504.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (4051720903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 680641 + ... + 686567.

It is an arithmetic number, because the mean of its divisors is an integer number (150775716).

Almost surely, 2^4051720908 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4051720908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5427925776).

4051720908 is an abundant number, since it is smaller than the sum of its proper divisors (6804130644).

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

4051720908 is a wasteful number, since it uses less digits than its factorization.

4051720908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7071 (or 7066 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 4051720908 is about 63653.1296009866. The cubic root of 4051720908 is about 1594.2135918819.

It can be divided in two parts, 40517 and 20908, that added together give a triangular number (61425 = T₃₅₀).

The spelling of 4051720908 in words is "four billion, fifty-one million, seven hundred twenty thousand, nine hundred eight".