428903172 has 36 divisors (see below), whose sum is σ = 1131312000. Its totient is φ = 136751472.

The previous prime is 428903171. The next prime is 428903179. The reversal of 428903172 is 271309824.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×428903172³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (428903171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 258172 + ... + 259827.

Almost surely, 2^428903172 is an apocalyptic number.

It is an amenable number.

428903172 is an abundant number, since it is smaller than the sum of its proper divisors (702408828).

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

428903172 is a wasteful number, since it uses less digits than its factorization.

428903172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518032 (or 518027 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 428903172 is about 20709.9775953524. The cubic root of 428903172 is about 754.1419264854.

The spelling of 428903172 in words is "four hundred twenty-eight million, nine hundred three thousand, one hundred seventy-two".