87240206 has 16 divisors (see below), whose sum is σ = 134242944. Its totient is φ = 42497784.

The previous prime is 87240199. The next prime is 87240217. The reversal of 87240206 is 60204278.

It is a super-2 number, since 2×87240206² = 15221707085844872, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 40841 + ... + 42923.

It is an arithmetic number, because the mean of its divisors is an integer number (8390184).

Almost surely, 2^87240206 is an apocalyptic number.

87240206 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

87240206 is a deficient number, since it is larger than the sum of its proper divisors (47002738).

87240206 is a wasteful number, since it uses less digits than its factorization.

87240206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2615.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 87240206 is about 9340.2465706211. The cubic root of 87240206 is about 443.5121898165.

The spelling of 87240206 in words is "eighty-seven million, two hundred forty thousand, two hundred six".