172073772 has 54 divisors (see below), whose sum is σ = 471013452. Its totient is φ = 52943904.

The previous prime is 172073749. The next prime is 172073773. The reversal of 172073772 is 277370271.

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 (172073773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8058 + ... + 20225.

Almost surely, 2^172073772 is an apocalyptic number.

172073772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

172073772 is an abundant number, since it is smaller than the sum of its proper divisors (298939680).

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

172073772 is a wasteful number, since it uses less digits than its factorization.

172073772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28319 (or 28301 counting only the distinct ones).

The product of its (nonzero) digits is 28812, while the sum is 36.

The square root of 172073772 is about 13117.6892782227. The cubic root of 172073772 is about 556.2092746012.

The spelling of 172073772 in words is "one hundred seventy-two million, seventy-three thousand, seven hundred seventy-two".