47643390 has 80 divisors (see below), whose sum is σ = 129373200. Its totient is φ = 12579840.

The previous prime is 47643331. The next prime is 47643403. The reversal of 47643390 is 9334674.

47643390 is a `hidden beast` number, since 4 + 7 + 643 + 3 + 9 + 0 = 666.

It is a super-2 number, since 2×47643390² = 4539785221384200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 105886 + ... + 106334.

It is an arithmetic number, because the mean of its divisors is an integer number (1617165).

Almost surely, 2^47643390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47643390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64686600).

47643390 is an abundant number, since it is smaller than the sum of its proper divisors (81729810).

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

47643390 is a wasteful number, since it uses less digits than its factorization.

47643390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599 (or 590 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The square root of 47643390 is about 6902.4191411417. The cubic root of 47643390 is about 362.5218758102.

The spelling of 47643390 in words is "forty-seven million, six hundred forty-three thousand, three hundred ninety".