172949490 has 96 divisors (see below), whose sum is σ = 516312576. Its totient is φ = 39346560.

The previous prime is 172949431. The next prime is 172949501. The reversal of 172949490 is 94949271.

It is a happy number.

172949490 is a `hidden beast` number, since 1 + 72 + 9 + 494 + 90 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 170224 + ... + 171236.

It is an arithmetic number, because the mean of its divisors is an integer number (5378256).

Almost surely, 2^172949490 is an apocalyptic number.

172949490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 172949490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258156288).

172949490 is an abundant number, since it is smaller than the sum of its proper divisors (343363086).

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

172949490 is a wasteful number, since it uses less digits than its factorization.

172949490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1304 (or 1301 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 172949490 is about 13151.0261957005. The cubic root of 172949490 is about 557.1512320522.

The spelling of 172949490 in words is "one hundred seventy-two million, nine hundred forty-nine thousand, four hundred ninety".