47799840 has 144 divisors (see below), whose sum is σ = 165703104. Its totient is φ = 11573760.

The previous prime is 47799833. The next prime is 47799841. The reversal of 47799840 is 4899774.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 47799840.

It is not an unprimeable number, because it can be changed into a prime (47799841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57669 + ... + 58491.

It is an arithmetic number, because the mean of its divisors is an integer number (1150716).

Almost surely, 2^47799840 is an apocalyptic number.

47799840 is a gapful number since it is divisible by the number (40) 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 47799840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82851552).

47799840 is an abundant number, since it is smaller than the sum of its proper divisors (117903264).

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

47799840 is a wasteful number, since it uses less digits than its factorization.

47799840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863 (or 844 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 48.

The square root of 47799840 is about 6913.7428358307. The cubic root of 47799840 is about 362.9182552386.

The spelling of 47799840 in words is "forty-seven million, seven hundred ninety-nine thousand, eight hundred forty".