47722220 has 72 divisors (see below), whose sum is σ = 124082784. Its totient is φ = 15095808.

The previous prime is 47722219. The next prime is 47722231. The reversal of 47722220 is 2222774.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 47722220.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22652 + ... + 24668.

It is an arithmetic number, because the mean of its divisors is an integer number (1723372).

Almost surely, 2^47722220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47722220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62041392).

47722220 is an abundant number, since it is smaller than the sum of its proper divisors (76360564).

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

47722220 is a wasteful number, since it uses less digits than its factorization.

47722220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2059 (or 2044 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 26.

The square root of 47722220 is about 6908.1270978464. The cubic root of 47722220 is about 362.7217066269.

Adding to 47722220 its reverse (2222774), we get a palindrome (49944994).

The spelling of 47722220 in words is "forty-seven million, seven hundred twenty-two thousand, two hundred twenty".