172742870 has 16 divisors (see below), whose sum is σ = 327302640. Its totient is φ = 65460384.

The previous prime is 172742827. The next prime is 172742891. The reversal of 172742870 is 78247271.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 454397 + ... + 454776.

It is an arithmetic number, because the mean of its divisors is an integer number (20456415).

Almost surely, 2^172742870 is an apocalyptic number.

172742870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172742870 is a deficient number, since it is larger than the sum of its proper divisors (154559770).

172742870 is a wasteful number, since it uses less digits than its factorization.

172742870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909199.

The product of its (nonzero) digits is 43904, while the sum is 38.

The square root of 172742870 is about 13143.1681873131. The cubic root of 172742870 is about 556.9292704042.

The spelling of 172742870 in words is "one hundred seventy-two million, seven hundred forty-two thousand, eight hundred seventy".