64458987 has 8 divisors (see below), whose sum is σ = 86420880. Its totient is φ = 42734880.

The previous prime is 64458913. The next prime is 64458997. The reversal of 64458987 is 78985446.

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

It is not a de Polignac number, because 64458987 - 2¹⁰ = 64457963 is a prime.

It is a super-2 number, since 2×64458987² = 8309922010132338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64458997) 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, 58812 + ... + 59897.

It is an arithmetic number, because the mean of its divisors is an integer number (10802610).

Almost surely, 2^64458987 is an apocalyptic number.

64458987 is a deficient number, since it is larger than the sum of its proper divisors (21961893).

64458987 is a wasteful number, since it uses less digits than its factorization.

64458987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118893.

The product of its digits is 1935360, while the sum is 51.

The square root of 64458987 is about 8028.6354382298. The cubic root of 64458987 is about 400.9539460753.

The spelling of 64458987 in words is "sixty-four million, four hundred fifty-eight thousand, nine hundred eighty-seven".