428145642 has 16 divisors (see below), whose sum is σ = 951434880. Its totient is φ = 142715196.

The previous prime is 428145593. The next prime is 428145643. The reversal of 428145642 is 246541824.

428145642 is a `hidden beast` number, since 4 + 2 + 8 + 1 + 4 + 5 + 642 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 428145597 and 428145606.

It is not an unprimeable number, because it can be changed into a prime (428145643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3964258 + ... + 3964365.

It is an arithmetic number, because the mean of its divisors is an integer number (59464680).

Almost surely, 2^428145642 is an apocalyptic number.

428145642 is an abundant number, since it is smaller than the sum of its proper divisors (523289238).

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

428145642 is a wasteful number, since it uses less digits than its factorization.

428145642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7928634 (or 7928628 counting only the distinct ones).

The product of its digits is 61440, while the sum is 36.

The square root of 428145642 is about 20691.6805020762. The cubic root of 428145642 is about 753.6976756332.

It can be divided in two parts, 428 and 145642, that added together give a triangular number (146070 = T₅₄₀).

The spelling of 428145642 in words is "four hundred twenty-eight million, one hundred forty-five thousand, six hundred forty-two".