172652638 has 4 divisors (see below), whose sum is σ = 258978960. Its totient is φ = 86326318.

The previous prime is 172652633. The next prime is 172652657. The reversal of 172652638 is 836256271.

172652638 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 172652638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172652633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43163158 + ... + 43163161.

It is an arithmetic number, because the mean of its divisors is an integer number (64744740).

Almost surely, 2^172652638 is an apocalyptic number.

172652638 is a deficient number, since it is larger than the sum of its proper divisors (86326322).

172652638 is an equidigital number, since it uses as much as digits as its factorization.

172652638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86326321.

The product of its digits is 120960, while the sum is 40.

The square root of 172652638 is about 13139.7350810433. The cubic root of 172652638 is about 556.8322831030.

The spelling of 172652638 in words is "one hundred seventy-two million, six hundred fifty-two thousand, six hundred thirty-eight".