172720276 has 6 divisors (see below), whose sum is σ = 302260490. Its totient is φ = 86360136.

The previous prime is 172720267. The next prime is 172720309. The reversal of 172720276 is 672027271.

It can be written as a sum of positive squares in only one way, i.e., 86676100 + 86044176 = 9310^2 + 9276^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21590031 + ... + 21590038.

Almost surely, 2^172720276 is an apocalyptic number.

It is an amenable number.

172720276 is a deficient number, since it is larger than the sum of its proper divisors (129540214).

172720276 is a wasteful number, since it uses less digits than its factorization.

172720276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43180073 (or 43180071 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 172720276 is about 13142.3086251998. The cubic root of 172720276 is about 556.9049880540.

The spelling of 172720276 in words is "one hundred seventy-two million, seven hundred twenty thousand, two hundred seventy-six".