284991157 has 8 divisors (see below), whose sum is σ = 314835840. Its totient is φ = 255802560.

The previous prime is 284991151. The next prime is 284991167. The reversal of 284991157 is 751199482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-284991157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (284991151) 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, 163108 + ... + 164845.

It is an arithmetic number, because the mean of its divisors is an integer number (39354480).

Almost surely, 2^284991157 is an apocalyptic number.

It is an amenable number.

284991157 is a deficient number, since it is larger than the sum of its proper divisors (29844683).

284991157 is a wasteful number, since it uses less digits than its factorization.

284991157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328043.

The product of its digits is 181440, while the sum is 46.

The square root of 284991157 is about 16881.6811070462. The cubic root of 284991157 is about 658.0776300904.

The spelling of 284991157 in words is "two hundred eighty-four million, nine hundred ninety-one thousand, one hundred fifty-seven".