287420222220 has 48 divisors (see below), whose sum is σ = 810177832800. Its totient is φ = 76130991616.

The previous prime is 287420222213. The next prime is 287420222227. The reversal of 287420222220 is 22222024782.

It is an interprime number because it is at equal distance from previous prime (287420222213) and next prime (287420222227).

It is a super-2 number, since 2×287420222220² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (287420222227) 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 15 ways as a sum of consecutive naturals, for example, 16066017 + ... + 16083896.

It is an arithmetic number, because the mean of its divisors is an integer number (16878704850).

Almost surely, 2^287420222220 is an apocalyptic number.

287420222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

287420222220 is an abundant number, since it is smaller than the sum of its proper divisors (522757610580).

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

287420222220 is a wasteful number, since it uses less digits than its factorization.

287420222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32150074 (or 32150072 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 33.

The spelling of 287420222220 in words is "two hundred eighty-seven billion, four hundred twenty million, two hundred twenty-two thousand, two hundred twenty".