172154440 has 128 divisors (see below), whose sum is σ = 431568000. Its totient is φ = 61544448.

The previous prime is 172154431. The next prime is 172154539. The reversal of 172154440 is 44451271.

It is a junction number, because it is equal to n+sod(n) for n = 172154399 and 172154408.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1608867 + ... + 1608973.

It is an arithmetic number, because the mean of its divisors is an integer number (3371625).

Almost surely, 2^172154440 is an apocalyptic number.

172154440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172154440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215784000).

172154440 is an abundant number, since it is smaller than the sum of its proper divisors (259413560).

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

172154440 is a wasteful number, since it uses less digits than its factorization.

172154440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239 (or 235 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 172154440 is about 13120.7636972853. The cubic root of 172154440 is about 556.2961777933.

The spelling of 172154440 in words is "one hundred seventy-two million, one hundred fifty-four thousand, four hundred forty".