172434420 has 60 divisors (see below), whose sum is σ = 540938244. Its totient is φ = 45982080.

The previous prime is 172434419. The next prime is 172434433. The reversal of 172434420 is 24434271.

172434420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 21734244 + 150700176 = 4662^2 + 12276^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 51601 + ... + 54840.

Almost surely, 2^172434420 is an apocalyptic number.

172434420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172434420 is an abundant number, since it is smaller than the sum of its proper divisors (368503824).

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

172434420 is a wasteful number, since it uses less digits than its factorization.

172434420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106462 (or 106451 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 172434420 is about 13131.4287113018. The cubic root of 172434420 is about 556.5975882505.

Adding to 172434420 its reverse (24434271), we get a palindrome (196868691).

The spelling of 172434420 in words is "one hundred seventy-two million, four hundred thirty-four thousand, four hundred twenty".