47397636 has 216 divisors, whose sum is σ = 151820032. Its totient is φ = 12830400.

The previous prime is 47397631. The next prime is 47397643. The reversal of 47397636 is 63679374.

47397636 is a `hidden beast` number, since 4 + 7 + 3 + 9 + 7 + 636 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 47397591 and 47397600.

It is not an unprimeable number, because it can be changed into a prime (47397631) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1528941 + ... + 1528971.

Almost surely, 2^47397636 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 47397636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75910016).

47397636 is an abundant number, since it is smaller than the sum of its proper divisors (104422396).

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

47397636 is a wasteful number, since it uses less digits than its factorization.

47397636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85 (or 60 counting only the distinct ones).

The product of its digits is 571536, while the sum is 45.

The square root of 47397636 is about 6884.5941056826. The cubic root of 47397636 is about 361.8974812203.

The spelling of 47397636 in words is "forty-seven million, three hundred ninety-seven thousand, six hundred thirty-six".