47389857 has 16 divisors (see below), whose sum is σ = 68808000. Its totient is φ = 28897344.

The previous prime is 47389841. The next prime is 47389861. The reversal of 47389857 is 75898374.

It is not a de Polignac number, because 47389857 - 2⁴ = 47389841 is a prime.

It is a super-4 number, since 4×47389857⁴ (a number of 32 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (47389057) 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, 12682 + ... + 15987.

It is an arithmetic number, because the mean of its divisors is an integer number (4300500).

Almost surely, 2^47389857 is an apocalyptic number.

It is an amenable number.

47389857 is a deficient number, since it is larger than the sum of its proper divisors (21418143).

47389857 is a wasteful number, since it uses less digits than its factorization.

47389857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28720.

The product of its digits is 1693440, while the sum is 51.

The square root of 47389857 is about 6884.0291254468. The cubic root of 47389857 is about 361.8776816778.

The spelling of 47389857 in words is "forty-seven million, three hundred eighty-nine thousand, eight hundred fifty-seven".