172785020 has 12 divisors (see below), whose sum is σ = 362848584. Its totient is φ = 69114000.

The previous prime is 172785017. The next prime is 172785061. The reversal of 172785020 is 20587271.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4319606 + ... + 4319645.

It is an arithmetic number, because the mean of its divisors is an integer number (30237382).

Almost surely, 2^172785020 is an apocalyptic number.

172785020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172785020 is an abundant number, since it is smaller than the sum of its proper divisors (190063564).

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

172785020 is a wasteful number, since it uses less digits than its factorization.

172785020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8639260 (or 8639258 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 172785020 is about 13144.7715841699. The cubic root of 172785020 is about 556.9745644294.

The spelling of 172785020 in words is "one hundred seventy-two million, seven hundred eighty-five thousand, twenty".