47981808 has 240 divisors, whose sum is σ = 166822656. Its totient is φ = 13063680.

The previous prime is 47981797. The next prime is 47981839. The reversal of 47981808 is 80818974.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1115835 + ... + 1115877.

Almost surely, 2^47981808 is an apocalyptic number.

47981808 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47981808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83411328).

47981808 is an abundant number, since it is smaller than the sum of its proper divisors (118840848).

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

47981808 is a wasteful number, since it uses less digits than its factorization.

47981808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 47981808 is about 6926.8902113430. The cubic root of 47981808 is about 363.3782001846.

The spelling of 47981808 in words is "forty-seven million, nine hundred eighty-one thousand, eight hundred eight".