4639891428 has 36 divisors (see below), whose sum is σ = 12345911760. Its totient is φ = 1465228656.

The previous prime is 4639891411. The next prime is 4639891463. The reversal of 4639891428 is 8241989364.

4639891428 is a `hidden beast` number, since 46 + 3 + 98 + 91 + 428 = 666.

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

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 3391050 + ... + 3392417.

Almost surely, 2^4639891428 is an apocalyptic number.

It is an amenable number.

4639891428 is an abundant number, since it is smaller than the sum of its proper divisors (7706020332).

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

4639891428 is a wasteful number, since it uses less digits than its factorization.

4639891428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6783496 (or 6783491 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 54.

The square root of 4639891428 is about 68116.7485131227. The cubic root of 4639891428 is about 1667.8971737589.

The spelling of 4639891428 in words is "four billion, six hundred thirty-nine million, eight hundred ninety-one thousand, four hundred twenty-eight".