47782278 has 16 divisors (see below), whose sum is σ = 106182960. Its totient is φ = 15927408.

The previous prime is 47782277. The next prime is 47782303. The reversal of 47782278 is 87228774.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47782277) 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, 442375 + ... + 442482.

It is an arithmetic number, because the mean of its divisors is an integer number (6636435).

Almost surely, 2^47782278 is an apocalyptic number.

47782278 is an abundant number, since it is smaller than the sum of its proper divisors (58400682).

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

47782278 is a wasteful number, since it uses less digits than its factorization.

47782278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884868 (or 884862 counting only the distinct ones).

The product of its digits is 351232, while the sum is 45.

The square root of 47782278 is about 6912.4726400905. The cubic root of 47782278 is about 362.8738035479.

It can be divided in two parts, 4778 and 2278, that added together give a square (7056 = 84²).

The spelling of 47782278 in words is "forty-seven million, seven hundred eighty-two thousand, two hundred seventy-eight".