287372020 has 48 divisors (see below), whose sum is σ = 672330960. Its totient is φ = 102445056.

The previous prime is 287371943. The next prime is 287372027. The reversal of 287372020 is 20273782.

It can be written as a sum of positive squares in 8 ways, for example, as 13337104 + 274034916 = 3652^2 + 16554^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287372027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11517 + ... + 26596.

It is an arithmetic number, because the mean of its divisors is an integer number (14006895).

Almost surely, 2^287372020 is an apocalyptic number.

287372020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

287372020 is an abundant number, since it is smaller than the sum of its proper divisors (384958940).

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

287372020 is a wasteful number, since it uses less digits than its factorization.

287372020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38164 (or 38162 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 287372020 is about 16952.0506134214. The cubic root of 287372020 is about 659.9051133869.

The spelling of 287372020 in words is "two hundred eighty-seven million, three hundred seventy-two thousand, twenty".