172440329420 has 48 divisors (see below), whose sum is σ = 372182039040. Its totient is φ = 67086512064.

The previous prime is 172440329419. The next prime is 172440329461. The reversal of 172440329420 is 24923044271.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 708614 + ... + 920333.

It is an arithmetic number, because the mean of its divisors is an integer number (7753792480).

Almost surely, 2^172440329420 is an apocalyptic number.

172440329420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172440329420 is an abundant number, since it is smaller than the sum of its proper divisors (199741709620).

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

172440329420 is a wasteful number, since it uses less digits than its factorization.

172440329420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1629102 (or 1629100 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 38.

The spelling of 172440329420 in words is "one hundred seventy-two billion, four hundred forty million, three hundred twenty-nine thousand, four hundred twenty".