47147280 has 80 divisors (see below), whose sum is σ = 150895104. Its totient is φ = 12165120.

The previous prime is 47147231. The next prime is 47147299. The reversal of 47147280 is 8274174.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×47147280² = 4445732022796800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4272 + ... + 10608.

Almost surely, 2^47147280 is an apocalyptic number.

47147280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47147280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75447552).

47147280 is an abundant number, since it is smaller than the sum of its proper divisors (103747824).

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

47147280 is a wasteful number, since it uses less digits than its factorization.

47147280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6384 (or 6378 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 33.

The square root of 47147280 is about 6866.3876965986. The cubic root of 47147280 is about 361.2591709138.

The spelling of 47147280 in words is "forty-seven million, one hundred forty-seven thousand, two hundred eighty".