47149830 has 256 divisors, whose sum is σ = 164505600. Its totient is φ = 9331200.

The previous prime is 47149829. The next prime is 47149831. The reversal of 47149830 is 3894174.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (47149829) and next prime (47149831).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47149831) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 466780 + ... + 466880.

It is an arithmetic number, because the mean of its divisors is an integer number (642600).

Almost surely, 2^47149830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47149830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82252800).

47149830 is an abundant number, since it is smaller than the sum of its proper divisors (117355770).

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

47149830 is a wasteful number, since it uses less digits than its factorization.

47149830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 47149830 is about 6866.5733812434. The cubic root of 47149830 is about 361.2656837976.

The spelling of 47149830 in words is "forty-seven million, one hundred forty-nine thousand, eight hundred thirty".