172870460 has 24 divisors (see below), whose sum is σ = 414889440. Its totient is φ = 59269824.

The previous prime is 172870457. The next prime is 172870463. The reversal of 172870460 is 64078271.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (172870457) and next prime (172870463).

It is a super-2 number, since 2×172870460² = 59768391881223200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 172870460.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172870463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 617255 + ... + 617534.

It is an arithmetic number, because the mean of its divisors is an integer number (17287060).

Almost surely, 2^172870460 is an apocalyptic number.

172870460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172870460 is an abundant number, since it is smaller than the sum of its proper divisors (242018980).

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

172870460 is a wasteful number, since it uses less digits than its factorization.

172870460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234805 (or 1234803 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 172870460 is about 13148.0211438832. The cubic root of 172870460 is about 557.0663549196.

The spelling of 172870460 in words is "one hundred seventy-two million, eight hundred seventy thousand, four hundred sixty".