87403806 has 64 divisors (see below), whose sum is σ = 224156160. Its totient is φ = 24727680.

The previous prime is 87403763. The next prime is 87403831. The reversal of 87403806 is 60830478.

87403806 = 4673² + 4674² + ... + 4676².

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39366 + ... + 41526.

It is an arithmetic number, because the mean of its divisors is an integer number (3502440).

Almost surely, 2^87403806 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87403806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112078080).

87403806 is an abundant number, since it is smaller than the sum of its proper divisors (136752354).

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

87403806 is a wasteful number, since it uses less digits than its factorization.

87403806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2286 (or 2280 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 87403806 is about 9349.0002674083. Note that the first 3 decimals coincide. The cubic root of 87403806 is about 443.7892535269.

It can be divided in two parts, 87403 and 806, that added together give a square (88209 = 297²).

The spelling of 87403806 in words is "eighty-seven million, four hundred three thousand, eight hundred six".