87720441 has 8 divisors (see below), whose sum is σ = 117335520. Its totient is φ = 58292832.

The previous prime is 87720439. The next prime is 87720449. The reversal of 87720441 is 14402778.

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

It is not a de Polignac number, because 87720441 - 2¹ = 87720439 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87720449) 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, 45771 + ... + 47648.

It is an arithmetic number, because the mean of its divisors is an integer number (14666940).

Almost surely, 2^87720441 is an apocalyptic number.

It is an amenable number.

87720441 is a deficient number, since it is larger than the sum of its proper divisors (29615079).

87720441 is a wasteful number, since it uses less digits than its factorization.

87720441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93735.

The product of its (nonzero) digits is 12544, while the sum is 33.

The square root of 87720441 is about 9365.9191220083. The cubic root of 87720441 is about 444.3245081211.

The spelling of 87720441 in words is "eighty-seven million, seven hundred twenty thousand, four hundred forty-one".