428115772 has 24 divisors (see below), whose sum is σ = 858130784. Its totient is φ = 183071232.

The previous prime is 428115749. The next prime is 428115803. The reversal of 428115772 is 277511824.

It is a super-2 number, since 2×428115772² = 366566228470311968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3933 + ... + 29524.

Almost surely, 2^428115772 is an apocalyptic number.

It is an amenable number.

428115772 is an abundant number, since it is smaller than the sum of its proper divisors (430015012).

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

428115772 is a wasteful number, since it uses less digits than its factorization.

428115772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33925 (or 33923 counting only the distinct ones).

The product of its digits is 31360, while the sum is 37.

The square root of 428115772 is about 20690.9587018098. The cubic root of 428115772 is about 753.6801477401.

The spelling of 428115772 in words is "four hundred twenty-eight million, one hundred fifteen thousand, seven hundred seventy-two".