2820172680 has 128 divisors (see below), whose sum is σ = 10123747200. Its totient is φ = 694192896.

The previous prime is 2820172633. The next prime is 2820172681. The reversal of 2820172680 is 862710282.

It is a happy number.

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 (2820172681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86394 + ... + 114473.

It is an arithmetic number, because the mean of its divisors is an integer number (79091775).

Almost surely, 2^2820172680 is an apocalyptic number.

2820172680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2820172680 is an abundant number, since it is smaller than the sum of its proper divisors (7303574520).

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

2820172680 is a wasteful number, since it uses less digits than its factorization.

2820172680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200900 (or 200890 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 2820172680 is about 53105.2980407793. The cubic root of 2820172680 is about 1412.8364810933.

The spelling of 2820172680 in words is "two billion, eight hundred twenty million, one hundred seventy-two thousand, six hundred eighty".