172742772 has 12 divisors (see below), whose sum is σ = 403066496. Its totient is φ = 57580920.

The previous prime is 172742771. The next prime is 172742803. The reversal of 172742772 is 277247271.

172742772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 172742772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172742771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7197604 + ... + 7197627.

Almost surely, 2^172742772 is an apocalyptic number.

172742772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

172742772 is an abundant number, since it is smaller than the sum of its proper divisors (230323724).

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

172742772 is a wasteful number, since it uses less digits than its factorization.

172742772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14395238 (or 14395236 counting only the distinct ones).

The product of its digits is 76832, while the sum is 39.

The square root of 172742772 is about 13143.1644591400. The cubic root of 172742772 is about 556.9291650856.

The spelling of 172742772 in words is "one hundred seventy-two million, seven hundred forty-two thousand, seven hundred seventy-two".