287644338428 has 6 divisors (see below), whose sum is σ = 503377592256. Its totient is φ = 143822169212.

The previous prime is 287644338413. The next prime is 287644338461. The reversal of 287644338428 is 824833446782.

It is a super-2 number, since 2×287644338428² (a number of 24 digits) 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 (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35955542300 + ... + 35955542307.

It is an arithmetic number, because the mean of its divisors is an integer number (83896265376).

Almost surely, 2^287644338428 is an apocalyptic number.

It is an amenable number.

287644338428 is a deficient number, since it is larger than the sum of its proper divisors (215733253828).

287644338428 is a wasteful number, since it uses less digits than its factorization.

287644338428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71911084611 (or 71911084609 counting only the distinct ones).

The product of its digits is 49545216, while the sum is 59.

The spelling of 287644338428 in words is "two hundred eighty-seven billion, six hundred forty-four million, three hundred thirty-eight thousand, four hundred twenty-eight".