63172470 has 32 divisors (see below), whose sum is σ = 153122400. Its totient is φ = 16678400.

The previous prime is 63172441. The next prime is 63172471. The reversal of 63172470 is 7427136.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63172471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7395 + ... + 13454.

It is an arithmetic number, because the mean of its divisors is an integer number (4785075).

Almost surely, 2^63172470 is an apocalyptic number.

63172470 is an abundant number, since it is smaller than the sum of its proper divisors (89949930).

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

63172470 is a wasteful number, since it uses less digits than its factorization.

63172470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20960.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 63172470 is about 7948.1110963549. Note that the first 3 decimals coincide. The cubic root of 63172470 is about 398.2684947053.

The spelling of 63172470 in words is "sixty-three million, one hundred seventy-two thousand, four hundred seventy".