86819490 has 24 divisors (see below), whose sum is σ = 225730908. Its totient is φ = 23151840.

The previous prime is 86819477. The next prime is 86819497. The reversal of 86819490 is 9491868.

86819490 is a `hidden beast` number, since 86 + 81 + 9 + 490 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 69505569 + 17313921 = 8337^2 + 4161^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (86819497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 482241 + ... + 482420.

Almost surely, 2^86819490 is an apocalyptic number.

86819490 is an abundant number, since it is smaller than the sum of its proper divisors (138911418).

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

86819490 is a wasteful number, since it uses less digits than its factorization.

86819490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964674 (or 964671 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 86819490 is about 9317.6976770015. The cubic root of 86819490 is about 442.7980946494.

The spelling of 86819490 in words is "eighty-six million, eight hundred nineteen thousand, four hundred ninety".