47723280 has 80 divisors (see below), whose sum is σ = 161400384. Its totient is φ = 11568640.

The previous prime is 47723279. The next prime is 47723311. The reversal of 47723280 is 8232774.

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

It is a super-2 number, since 2×47723280² = 4555022907916800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 6399 + ... + 11678.

Almost surely, 2^47723280 is an apocalyptic number.

47723280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47723280 is an abundant number, since it is smaller than the sum of its proper divisors (113677104).

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

47723280 is a wasteful number, since it uses less digits than its factorization.

47723280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18104 (or 18098 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 47723280 is about 6908.2038186492. The cubic root of 47723280 is about 362.7243921834.

It can be divided in two parts, 47 and 723280, that added together give a palindrome (723327).

The spelling of 47723280 in words is "forty-seven million, seven hundred twenty-three thousand, two hundred eighty".