71472780 has 60 divisors (see below), whose sum is σ = 224217840. Its totient is φ = 19058976.

The previous prime is 71472769. The next prime is 71472781. The reversal of 71472780 is 8727417.

It is a tau number, because it is divible by the number of its divisors (60).

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

It is not an unprimeable number, because it can be changed into a prime (71472781) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 20440 + ... + 23679.

It is an arithmetic number, because the mean of its divisors is an integer number (3736964).

Almost surely, 2^71472780 is an apocalyptic number.

It is an amenable number.

71472780 is an abundant number, since it is smaller than the sum of its proper divisors (152745060).

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

71472780 is a wasteful number, since it uses less digits than its factorization.

71472780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44140 (or 44129 counting only the distinct ones).

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

The square root of 71472780 is about 8454.1575570840. The cubic root of 71472780 is about 414.9988484025.

The spelling of 71472780 in words is "seventy-one million, four hundred seventy-two thousand, seven hundred eighty".