86881940 has 24 divisors (see below), whose sum is σ = 182741832. Its totient is φ = 34697600.

The previous prime is 86881939. The next prime is 86881943. The reversal of 86881940 is 4918868.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17859076 + 69022864 = 4226^2 + 8308^2 .

It is a junction number, because it is equal to n+sod(n) for n = 86881891 and 86881900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86881943) 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, 10922 + ... + 17118.

It is an arithmetic number, because the mean of its divisors is an integer number (7614243).

Almost surely, 2^86881940 is an apocalyptic number.

It is an amenable number.

86881940 is an abundant number, since it is smaller than the sum of its proper divisors (95859892).

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

86881940 is a wasteful number, since it uses less digits than its factorization.

86881940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6907 (or 6905 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 86881940 is about 9321.0482243147. The cubic root of 86881940 is about 442.9042386860.

The spelling of 86881940 in words is "eighty-six million, eight hundred eighty-one thousand, nine hundred forty".