172887393840 has 320 divisors, whose sum is σ = 627143193600. Its totient is φ = 39382640640.

The previous prime is 172887393803. The next prime is 172887393851. The reversal of 172887393840 is 48393788271.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25268820 + ... + 25275660.

It is an arithmetic number, because the mean of its divisors is an integer number (1959822480).

Almost surely, 2^172887393840 is an apocalyptic number.

172887393840 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 172887393840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (313571596800).

172887393840 is an abundant number, since it is smaller than the sum of its proper divisors (454255799760).

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

172887393840 is a wasteful number, since it uses less digits than its factorization.

172887393840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7185 (or 7165 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 60.

The spelling of 172887393840 in words is "one hundred seventy-two billion, eight hundred eighty-seven million, three hundred ninety-three thousand, eight hundred forty".