47489820 has 144 divisors (see below), whose sum is σ = 160302240. Its totient is φ = 10461696.

The previous prime is 47489809. The next prime is 47489839. The reversal of 47489820 is 2898474.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 84982 + ... + 85538.

It is an arithmetic number, because the mean of its divisors is an integer number (1113210).

Almost surely, 2^47489820 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 47489820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80151120).

47489820 is an abundant number, since it is smaller than the sum of its proper divisors (112812420).

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

47489820 is a wasteful number, since it uses less digits than its factorization.

47489820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612 (or 603 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 47489820 is about 6891.2858016483. The cubic root of 47489820 is about 362.1319482771.

The spelling of 47489820 in words is "forty-seven million, four hundred eighty-nine thousand, eight hundred twenty".