47387728 has 40 divisors (see below), whose sum is σ = 97422336. Its totient is φ = 22281600.

The previous prime is 47387719. The next prime is 47387737. The reversal of 47387728 is 82778374.

It is an interprime number because it is at equal distance from previous prime (47387719) and next prime (47387737).

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21393 + ... + 23503.

Almost surely, 2^47387728 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 47387728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48711168).

47387728 is an abundant number, since it is smaller than the sum of its proper divisors (50034608).

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

47387728 is a wasteful number, since it uses less digits than its factorization.

47387728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2203 (or 2197 counting only the distinct ones).

The product of its digits is 526848, while the sum is 46.

The square root of 47387728 is about 6883.8744904305. The cubic root of 47387728 is about 361.8722624512.

The spelling of 47387728 in words is "forty-seven million, three hundred eighty-seven thousand, seven hundred twenty-eight".