47278893 has 8 divisors (see below), whose sum is σ = 63836800. Its totient is φ = 31120128.

The previous prime is 47278877. The next prime is 47278901. The reversal of 47278893 is 39887274.

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

It is not a de Polignac number, because 47278893 - 2⁴ = 47278877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47278873) 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, 99508 + ... + 99981.

It is an arithmetic number, because the mean of its divisors is an integer number (7979600).

Almost surely, 2^47278893 is an apocalyptic number.

It is an amenable number.

47278893 is a deficient number, since it is larger than the sum of its proper divisors (16557907).

47278893 is a wasteful number, since it uses less digits than its factorization.

47278893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199571.

The product of its digits is 677376, while the sum is 48.

The square root of 47278893 is about 6875.9648777462. The cubic root of 47278893 is about 361.5950137546.

The spelling of 47278893 in words is "forty-seven million, two hundred seventy-eight thousand, eight hundred ninety-three".