172209470 has 32 divisors (see below), whose sum is σ = 319586688. Its totient is φ = 66763008.

The previous prime is 172209451. The next prime is 172209481. The reversal of 172209470 is 74902271.

It is a super-2 number, since 2×172209470² = 59312203115361800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115067 + ... + 116553.

It is an arithmetic number, because the mean of its divisors is an integer number (9987084).

Almost surely, 2^172209470 is an apocalyptic number.

172209470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172209470 is a deficient number, since it is larger than the sum of its proper divisors (147377218).

172209470 is a wasteful number, since it uses less digits than its factorization.

172209470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1844.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 172209470 is about 13122.8605875396. The cubic root of 172209470 is about 556.3554457339.

The spelling of 172209470 in words is "one hundred seventy-two million, two hundred nine thousand, four hundred seventy".