172072040 has 32 divisors (see below), whose sum is σ = 442471680. Its totient is φ = 58996032.

The previous prime is 172072027. The next prime is 172072049. The reversal of 172072040 is 40270271.

It is a junction number, because it is equal to n+sod(n) for n = 172071997 and 172072015.

It is not an unprimeable number, because it can be changed into a prime (172072049) by changing a digit.

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, 306992 + ... + 307551.

It is an arithmetic number, because the mean of its divisors is an integer number (13827240).

Almost surely, 2^172072040 is an apocalyptic number.

172072040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172072040 is an abundant number, since it is smaller than the sum of its proper divisors (270399640).

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

172072040 is a wasteful number, since it uses less digits than its factorization.

172072040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614561 (or 614557 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 172072040 is about 13117.6232603319. The cubic root of 172072040 is about 556.2074084293.

The spelling of 172072040 in words is "one hundred seventy-two million, seventy-two thousand, forty".