287148642 has 32 divisors (see below), whose sum is σ = 629683200. Its totient is φ = 86573520.

The previous prime is 287148611. The next prime is 287148643. The reversal of 287148642 is 246841782.

It is a junction number, because it is equal to n+sod(n) for n = 287148594 and 287148603.

It is not an unprimeable number, because it can be changed into a prime (287148643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2203 + ... + 24065.

It is an arithmetic number, because the mean of its divisors is an integer number (19677600).

Almost surely, 2^287148642 is an apocalyptic number.

287148642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

287148642 is an abundant number, since it is smaller than the sum of its proper divisors (342534558).

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

287148642 is a wasteful number, since it uses less digits than its factorization.

287148642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22078.

The product of its digits is 172032, while the sum is 42.

The square root of 287148642 is about 16945.4608081338. The cubic root of 287148642 is about 659.7340847959.

The spelling of 287148642 in words is "two hundred eighty-seven million, one hundred forty-eight thousand, six hundred forty-two".