47978084 has 24 divisors (see below), whose sum is σ = 104680128. Its totient is φ = 18692640.

The previous prime is 47978083. The next prime is 47978087. The reversal of 47978084 is 48087974.

It is a super-2 number, since 2×47978084² = 4603793088622112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (47978083) 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, 77579 + ... + 78194.

It is an arithmetic number, because the mean of its divisors is an integer number (4361672).

Almost surely, 2^47978084 is an apocalyptic number.

47978084 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

47978084 is an abundant number, since it is smaller than the sum of its proper divisors (56702044).

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

47978084 is a wasteful number, since it uses less digits than its factorization.

47978084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155795 (or 155793 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 47978084 is about 6926.6213986330. The cubic root of 47978084 is about 363.3687990144.

The spelling of 47978084 in words is "forty-seven million, nine hundred seventy-eight thousand, eighty-four".