47878128 has 50 divisors (see below), whose sum is σ = 138576944. Its totient is φ = 15958944.

The previous prime is 47878123. The next prime is 47878151. The reversal of 47878128 is 82187874.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47878121) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 17176 + ... + 19767.

Almost surely, 2^47878128 is an apocalyptic number.

47878128 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

47878128 is an abundant number, since it is smaller than the sum of its proper divisors (90698816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

47878128 is a wasteful number, since it uses less digits than its factorization.

47878128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36963 (or 36948 counting only the distinct ones).

The product of its digits is 200704, while the sum is 45.

The square root of 47878128 is about 6919.4022863250. The cubic root of 47878128 is about 363.1162799395.

It can be divided in two parts, 478 and 78128, that added together give a triangular number (78606 = T₃₉₆).

The spelling of 47878128 in words is "forty-seven million, eight hundred seventy-eight thousand, one hundred twenty-eight".