172990830 has 16 divisors (see below), whose sum is σ = 415178064. Its totient is φ = 46130880.

The previous prime is 172990817. The next prime is 172990837. The reversal of 172990830 is 38099271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172990837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2883151 + ... + 2883210.

It is an arithmetic number, because the mean of its divisors is an integer number (25948629).

Almost surely, 2^172990830 is an apocalyptic number.

172990830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172990830 is an abundant number, since it is smaller than the sum of its proper divisors (242187234).

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

172990830 is a wasteful number, since it uses less digits than its factorization.

172990830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5766371.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 172990830 is about 13152.5978422515. The cubic root of 172990830 is about 557.1956203435.

The spelling of 172990830 in words is "one hundred seventy-two million, nine hundred ninety thousand, eight hundred thirty".