86947644 has 48 divisors (see below), whose sum is σ = 232671488. Its totient is φ = 24755328.

The previous prime is 86947643. The next prime is 86947649. The reversal of 86947644 is 44674968.

It is a junction number, because it is equal to n+sod(n) for n = 86947593 and 86947602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86947643) 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, 24639 + ... + 27945.

Almost surely, 2^86947644 is an apocalyptic number.

86947644 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

86947644 is an abundant number, since it is smaller than the sum of its proper divisors (145723844).

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

86947644 is a wasteful number, since it uses less digits than its factorization.

86947644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3634 (or 3632 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 48.

The square root of 86947644 is about 9324.5720545235. The cubic root of 86947644 is about 443.0158585365.

The spelling of 86947644 in words is "eighty-six million, nine hundred forty-seven thousand, six hundred forty-four".