428949972 has 48 divisors (see below), whose sum is σ = 1213195200. Its totient is φ = 129984480.

The previous prime is 428949959. The next prime is 428950003. The reversal of 428949972 is 279949824.

428949972 is a `hidden beast` number, since 4 + 2 + 89 + 499 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179347 + ... + 181722.

It is an arithmetic number, because the mean of its divisors is an integer number (25274900).

Almost surely, 2^428949972 is an apocalyptic number.

It is an amenable number.

428949972 is an abundant number, since it is smaller than the sum of its proper divisors (784245228).

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

428949972 is a wasteful number, since it uses less digits than its factorization.

428949972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361093 (or 361085 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 428949972 is about 20711.1074546969. The cubic root of 428949972 is about 754.1693550216.

The spelling of 428949972 in words is "four hundred twenty-eight million, nine hundred forty-nine thousand, nine hundred seventy-two".