47815720 has 32 divisors (see below), whose sum is σ = 108144000. Its totient is φ = 19027008.

The previous prime is 47815711. The next prime is 47815721. The reversal of 47815720 is 2751874.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (47815721) 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, 4957 + ... + 10963.

It is an arithmetic number, because the mean of its divisors is an integer number (3379500).

Almost surely, 2^47815720 is an apocalyptic number.

47815720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47815720 is an abundant number, since it is smaller than the sum of its proper divisors (60328280).

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

47815720 is a wasteful number, since it uses less digits than its factorization.

47815720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6217 (or 6213 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 47815720 is about 6914.8911777410. The cubic root of 47815720 is about 362.9584401974.

It can be divided in two parts, 4781 and 5720, that added together give a palindrome (10501).

The spelling of 47815720 in words is "forty-seven million, eight hundred fifteen thousand, seven hundred twenty".