172738380 has 24 divisors (see below), whose sum is σ = 483667632. Its totient is φ = 46063552.

The previous prime is 172738337. The next prime is 172738387. The reversal of 172738380 is 83837271.

172738380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (172738387) 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, 1439427 + ... + 1439546.

It is an arithmetic number, because the mean of its divisors is an integer number (20152818).

Almost surely, 2^172738380 is an apocalyptic number.

172738380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172738380 is an abundant number, since it is smaller than the sum of its proper divisors (310929252).

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

172738380 is a wasteful number, since it uses less digits than its factorization.

172738380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2878985 (or 2878983 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 172738380 is about 13142.9973750283. The cubic root of 172738380 is about 556.9244450548.

The spelling of 172738380 in words is "one hundred seventy-two million, seven hundred thirty-eight thousand, three hundred eighty".