87823445 has 16 divisors (see below), whose sum is σ = 112315248. Its totient is φ = 65694720.

The previous prime is 87823441. The next prime is 87823451. The reversal of 87823445 is 54432878.

It can be written as a sum of positive squares in 8 ways, for example, as 2427364 + 85396081 = 1558^2 + 9241^2 .

It is not a de Polignac number, because 87823445 - 2² = 87823441 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87823441) 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, 10055 + ... + 16635.

It is an arithmetic number, because the mean of its divisors is an integer number (7019703).

Almost surely, 2^87823445 is an apocalyptic number.

87823445 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

87823445 is a deficient number, since it is larger than the sum of its proper divisors (24491803).

87823445 is a wasteful number, since it uses less digits than its factorization.

87823445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6760.

The product of its digits is 215040, while the sum is 41.

The square root of 87823445 is about 9371.4163817429. The cubic root of 87823445 is about 444.4983531947.

The spelling of 87823445 in words is "eighty-seven million, eight hundred twenty-three thousand, four hundred forty-five".