2861172720 has 300 divisors, whose sum is σ = 11560972104. Its totient is φ = 653909760.

The previous prime is 2861172707. The next prime is 2861172739. The reversal of 2861172720 is 272711682.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 313015 + ... + 322025.

Almost surely, 2^2861172720 is an apocalyptic number.

2861172720 is a gapful number since it is divisible by the number (20) 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 2861172720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5780486052).

2861172720 is an abundant number, since it is smaller than the sum of its proper divisors (8699799384).

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

2861172720 is a wasteful number, since it uses less digits than its factorization.

2861172720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9050 (or 9028 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 2861172720 is about 53489.9310150985. The cubic root of 2861172720 is about 1419.6502345586.

The spelling of 2861172720 in words is "two billion, eight hundred sixty-one million, one hundred seventy-two thousand, seven hundred twenty".