47021878 has 8 divisors (see below), whose sum is σ = 70756272. Its totient is φ = 23436456.

The previous prime is 47021861. The next prime is 47021921. The reversal of 47021878 is 87812074.

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

It is a super-2 number, since 2×47021878² = 4422114021293768, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36450 + ... + 37717.

It is an arithmetic number, because the mean of its divisors is an integer number (8844534).

Almost surely, 2^47021878 is an apocalyptic number.

47021878 is a deficient number, since it is larger than the sum of its proper divisors (23734394).

47021878 is a wasteful number, since it uses less digits than its factorization.

47021878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74486.

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 47021878 is about 6857.2500319005. The cubic root of 47021878 is about 360.9385949993.

The spelling of 47021878 in words is "forty-seven million, twenty-one thousand, eight hundred seventy-eight".