86724445 has 8 divisors (see below), whose sum is σ = 104733144. Its totient is φ = 68937024.

The previous prime is 86724439. The next prime is 86724457. The reversal of 86724445 is 54442768.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6335289 + 80389156 = 2517^2 + 8966^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 86724445 - 2³ = 86724437 is a prime.

It is a super-2 number, since 2×86724445² = 15042258721116050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 86724398 and 86724407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54454 + ... + 56023.

It is an arithmetic number, because the mean of its divisors is an integer number (13091643).

Almost surely, 2^86724445 is an apocalyptic number.

It is an amenable number.

86724445 is a deficient number, since it is larger than the sum of its proper divisors (18008699).

86724445 is a wasteful number, since it uses less digits than its factorization.

86724445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110639.

The product of its digits is 215040, while the sum is 40.

The square root of 86724445 is about 9312.5960397732. The cubic root of 86724445 is about 442.6364523271.

The spelling of 86724445 in words is "eighty-six million, seven hundred twenty-four thousand, four hundred forty-five".