71478224 has 10 divisors (see below), whose sum is σ = 138489090. Its totient is φ = 35739104.

The previous prime is 71478221. The next prime is 71478259. The reversal of 71478224 is 42287417.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 48052624 + 23425600 = 6932^2 + 4840^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71478221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2233679 + ... + 2233710.

It is an arithmetic number, because the mean of its divisors is an integer number (13848909).

Almost surely, 2^71478224 is an apocalyptic number.

It is an amenable number.

71478224 is a deficient number, since it is larger than the sum of its proper divisors (67010866).

71478224 is a wasteful number, since it uses less digits than its factorization.

71478224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4467397 (or 4467391 counting only the distinct ones).

The product of its digits is 25088, while the sum is 35.

The square root of 71478224 is about 8454.4795227146. The cubic root of 71478224 is about 415.0093847977.

The spelling of 71478224 in words is "seventy-one million, four hundred seventy-eight thousand, two hundred twenty-four".