172394780 has 24 divisors (see below), whose sum is σ = 366100560. Its totient is φ = 68182400.

The previous prime is 172394777. The next prime is 172394797. The reversal of 172394780 is 87493271.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46646 + ... + 50205.

It is an arithmetic number, because the mean of its divisors is an integer number (15254190).

Almost surely, 2^172394780 is an apocalyptic number.

172394780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172394780 is an abundant number, since it is smaller than the sum of its proper divisors (193705780).

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

172394780 is a wasteful number, since it uses less digits than its factorization.

172394780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96949 (or 96947 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 172394780 is about 13129.9192686018. The cubic root of 172394780 is about 556.5549339295.

The spelling of 172394780 in words is "one hundred seventy-two million, three hundred ninety-four thousand, seven hundred eighty".