87447646 has 16 divisors (see below), whose sum is σ = 154104048. Its totient is φ = 36691200.

The previous prime is 87447641. The next prime is 87447667. The reversal of 87447646 is 64674478.

It is a junction number, because it is equal to n+sod(n) for n = 87447596 and 87447605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87447641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152595 + ... + 153166.

It is an arithmetic number, because the mean of its divisors is an integer number (9631503).

Almost surely, 2^87447646 is an apocalyptic number.

87447646 is a deficient number, since it is larger than the sum of its proper divisors (66656402).

87447646 is a wasteful number, since it uses less digits than its factorization.

87447646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305787.

The product of its digits is 903168, while the sum is 46.

The square root of 87447646 is about 9351.3446091993. The cubic root of 87447646 is about 443.8634397277.

The spelling of 87447646 in words is "eighty-seven million, four hundred forty-seven thousand, six hundred forty-six".