172638416 has 10 divisors (see below), whose sum is σ = 334486962. Its totient is φ = 86319200.

The previous prime is 172638409. The next prime is 172638419. The reversal of 172638416 is 614836271.

It can be written as a sum of positive squares in only one way, i.e., 169104016 + 3534400 = 13004^2 + 1880^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 172638416.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172638419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5394935 + ... + 5394966.

Almost surely, 2^172638416 is an apocalyptic number.

172638416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

172638416 is a deficient number, since it is larger than the sum of its proper divisors (161848546).

172638416 is a wasteful number, since it uses less digits than its factorization.

172638416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10789909 (or 10789903 counting only the distinct ones).

The product of its digits is 48384, while the sum is 38.

The square root of 172638416 is about 13139.1938869932. The cubic root of 172638416 is about 556.8169932773.

The spelling of 172638416 in words is "one hundred seventy-two million, six hundred thirty-eight thousand, four hundred sixteen".