172047816 has 96 divisors (see below), whose sum is σ = 485147520. Its totient is φ = 55036800.

The previous prime is 172047809. The next prime is 172047823. The reversal of 172047816 is 618740271.

172047816 is a `hidden beast` number, since 172 + 0 + 478 + 16 = 666.

It is an interprime number because it is at equal distance from previous prime (172047809) and next prime (172047823).

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 23 ways as a sum of consecutive naturals, for example, 188401 + ... + 189311.

It is an arithmetic number, because the mean of its divisors is an integer number (5053620).

Almost surely, 2^172047816 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 172047816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242573760).

172047816 is an abundant number, since it is smaller than the sum of its proper divisors (313099704).

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

172047816 is a wasteful number, since it uses less digits than its factorization.

172047816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027 (or 1020 counting only the distinct ones).

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

The square root of 172047816 is about 13116.6998898351. The cubic root of 172047816 is about 556.1813065699.

The spelling of 172047816 in words is "one hundred seventy-two million, forty-seven thousand, eight hundred sixteen".