172040418 has 24 divisors (see below), whose sum is σ = 406641456. Its totient is φ = 52133400.

The previous prime is 172040413. The next prime is 172040419. The reversal of 172040418 is 814040271.

It is a super-2 number, since 2×172040418² = 59195810851229448, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 172040391 and 172040400.

It is not an unprimeable number, because it can be changed into a prime (172040413) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 434248 + ... + 434643.

It is an arithmetic number, because the mean of its divisors is an integer number (16943394).

Almost surely, 2^172040418 is an apocalyptic number.

172040418 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

172040418 is an abundant number, since it is smaller than the sum of its proper divisors (234601038).

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

172040418 is a wasteful number, since it uses less digits than its factorization.

172040418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868910 (or 868907 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 172040418 is about 13116.4178798939. The cubic root of 172040418 is about 556.1733345841.

Adding to 172040418 its reverse (814040271), we get a palindrome (986080689).

The spelling of 172040418 in words is "one hundred seventy-two million, forty thousand, four hundred eighteen".