87202406 has 4 divisors (see below), whose sum is σ = 130803612. Its totient is φ = 43601202.

The previous prime is 87202403. The next prime is 87202417. The reversal of 87202406 is 60420278.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×87202406² = 15208519224377672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87202403) 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 as a sum of consecutive naturals, namely, 21800600 + ... + 21800603.

It is an arithmetic number, because the mean of its divisors is an integer number (32700903).

Almost surely, 2^87202406 is an apocalyptic number.

87202406 is a deficient number, since it is larger than the sum of its proper divisors (43601206).

87202406 is a wasteful number, since it uses less digits than its factorization.

87202406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43601205.

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

The square root of 87202406 is about 9338.2228502001. Note that the first 3 decimals coincide. The cubic root of 87202406 is about 443.4481246206.

The spelling of 87202406 in words is "eighty-seven million, two hundred two thousand, four hundred six".