47658987 has 24 divisors (see below), whose sum is σ = 70726656. Its totient is φ = 30910896.

The previous prime is 47658983. The next prime is 47659009. The reversal of 47658987 is 78985674.

It is not a de Polignac number, because 47658987 - 2² = 47658983 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (47658983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129678 + ... + 130044.

It is an arithmetic number, because the mean of its divisors is an integer number (2946944).

Almost surely, 2^47658987 is an apocalyptic number.

47658987 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

47658987 is a deficient number, since it is larger than the sum of its proper divisors (23067669).

47658987 is a wasteful number, since it uses less digits than its factorization.

47658987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727 (or 724 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The square root of 47658987 is about 6903.5488699654. The cubic root of 47658987 is about 362.5614310476.

The spelling of 47658987 in words is "forty-seven million, six hundred fifty-eight thousand, nine hundred eighty-seven".