2172770236 has 48 divisors (see below), whose sum is σ = 4793987520. Its totient is φ = 838586880.

The previous prime is 2172770231. The next prime is 2172770267. The reversal of 2172770236 is 6320772712.

It is a junction number, because it is equal to n+sod(n) for n = 2172770195 and 2172770204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172770231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57871 + ... + 87718.

It is an arithmetic number, because the mean of its divisors is an integer number (99874740).

Almost surely, 2^2172770236 is an apocalyptic number.

2172770236 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2172770236 is an abundant number, since it is smaller than the sum of its proper divisors (2621217284).

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

2172770236 is a wasteful number, since it uses less digits than its factorization.

2172770236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145654 (or 145652 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 37.

The square root of 2172770236 is about 46612.9835560866. The cubic root of 2172770236 is about 1295.2032767267.

The spelling of 2172770236 in words is "two billion, one hundred seventy-two million, seven hundred seventy thousand, two hundred thirty-six".