87201780 has 48 divisors (see below), whose sum is σ = 247269120. Its totient is φ = 22958208.

The previous prime is 87201767. The next prime is 87201787. The reversal of 87201780 is 8710278.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87201787) 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, 4459 + ... + 13938.

It is an arithmetic number, because the mean of its divisors is an integer number (5151440).

Almost surely, 2^87201780 is an apocalyptic number.

It is an amenable number.

87201780 is an abundant number, since it is smaller than the sum of its proper divisors (160067340).

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

87201780 is a wasteful number, since it uses less digits than its factorization.

87201780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18488 (or 18486 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 33.

The square root of 87201780 is about 9338.1893319851. The cubic root of 87201780 is about 443.4470634908.

The spelling of 87201780 in words is "eighty-seven million, two hundred one thousand, seven hundred eighty".