47021730 has 96 divisors (see below), whose sum is σ = 133840512. Its totient is φ = 10356480.

The previous prime is 47021719. The next prime is 47021749. The reversal of 47021730 is 3712074.

It is a super-2 number, since 2×47021730² = 4422086184385800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 47021730.

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, 201694 + ... + 201926.

It is an arithmetic number, because the mean of its divisors is an integer number (1394172).

Almost surely, 2^47021730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47021730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66920256).

47021730 is an abundant number, since it is smaller than the sum of its proper divisors (86818782).

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

47021730 is a wasteful number, since it uses less digits than its factorization.

47021730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 47021730 is about 6857.2392403941. The cubic root of 47021730 is about 360.9382163176.

The spelling of 47021730 in words is "forty-seven million, twenty-one thousand, seven hundred thirty".