47421660 has 96 divisors (see below), whose sum is σ = 156022272. Its totient is φ = 10609920.

The previous prime is 47421659. The next prime is 47421677. The reversal of 47421660 is 6612474.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5817 + ... + 11343.

It is an arithmetic number, because the mean of its divisors is an integer number (1625232).

Almost surely, 2^47421660 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 47421660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78011136).

47421660 is an abundant number, since it is smaller than the sum of its proper divisors (108600612).

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

47421660 is a wasteful number, since it uses less digits than its factorization.

47421660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5563 (or 5561 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 47421660 is about 6886.3386498197. The cubic root of 47421660 is about 361.9586147656.

The spelling of 47421660 in words is "forty-seven million, four hundred twenty-one thousand, six hundred sixty".