47017728 has 54 divisors (see below), whose sum is σ = 135570344. Its totient is φ = 15671808.

The previous prime is 47017717. The next prime is 47017739. The reversal of 47017728 is 82771074.

It is an interprime number because it is at equal distance from previous prime (47017717) and next prime (47017739).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 47017692 and 47017701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7900 + ... + 12507.

Almost surely, 2^47017728 is an apocalyptic number.

47017728 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

47017728 is an abundant number, since it is smaller than the sum of its proper divisors (88552616).

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

47017728 is a wasteful number, since it uses less digits than its factorization.

47017728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20429 (or 20412 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 36.

The square root of 47017728 is about 6856.9474257865. The cubic root of 47017728 is about 360.9279762596.

The spelling of 47017728 in words is "forty-seven million, seventeen thousand, seven hundred twenty-eight".