47779220 has 12 divisors (see below), whose sum is σ = 100336404. Its totient is φ = 19111680.

The previous prime is 47779219. The next prime is 47779229. The reversal of 47779220 is 2297774.

It can be written as a sum of positive squares in 2 ways, for example, as 37112464 + 10666756 = 6092^2 + 3266^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47779229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1194461 + ... + 1194500.

It is an arithmetic number, because the mean of its divisors is an integer number (8361367).

Almost surely, 2^47779220 is an apocalyptic number.

It is an amenable number.

47779220 is an abundant number, since it is smaller than the sum of its proper divisors (52557184).

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

47779220 is a wasteful number, since it uses less digits than its factorization.

47779220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2388970 (or 2388968 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 38.

The square root of 47779220 is about 6912.2514421858. The cubic root of 47779220 is about 362.8660622414.

It can be divided in two parts, 477 and 79220, that added together give a palindrome (79697).

The spelling of 47779220 in words is "forty-seven million, seven hundred seventy-nine thousand, two hundred twenty".