172876820 has 48 divisors (see below), whose sum is σ = 383745600. Its totient is φ = 65237760.

The previous prime is 172876793. The next prime is 172876829. The reversal of 172876820 is 28678271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172876829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105971 + ... + 107589.

It is an arithmetic number, because the mean of its divisors is an integer number (7994700).

Almost surely, 2^172876820 is an apocalyptic number.

172876820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172876820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191872800).

172876820 is an abundant number, since it is smaller than the sum of its proper divisors (210868780).

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

172876820 is a wasteful number, since it uses less digits than its factorization.

172876820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1928 (or 1926 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 172876820 is about 13148.2630031499. The cubic root of 172876820 is about 557.0731864291.

The spelling of 172876820 in words is "one hundred seventy-two million, eight hundred seventy-six thousand, eight hundred twenty".