47851780 has 24 divisors (see below), whose sum is σ = 101487960. Its totient is φ = 18950400.

The previous prime is 47851777. The next prime is 47851789. The reversal of 47851780 is 8715874.

It can be written as a sum of positive squares in 4 ways, for example, as 4186116 + 43665664 = 2046^2 + 6608^2 .

It is not an unprimeable number, because it can be changed into a prime (47851789) 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, 9825 + ... + 13864.

It is an arithmetic number, because the mean of its divisors is an integer number (4228665).

Almost surely, 2^47851780 is an apocalyptic number.

It is an amenable number.

47851780 is an abundant number, since it is smaller than the sum of its proper divisors (53636180).

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

47851780 is a wasteful number, since it uses less digits than its factorization.

47851780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23799 (or 23797 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 47851780 is about 6917.4981026380. The cubic root of 47851780 is about 363.0496584033.

The spelling of 47851780 in words is "forty-seven million, eight hundred fifty-one thousand, seven hundred eighty".