71380420 has 12 divisors (see below), whose sum is σ = 149898924. Its totient is φ = 28552160.

The previous prime is 71380411. The next prime is 71380423. The reversal of 71380420 is 2408317.

It can be written as a sum of positive squares in 2 ways, for example, as 11410884 + 59969536 = 3378^2 + 7744^2 .

It is not an unprimeable number, because it can be changed into a prime (71380423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1784491 + ... + 1784530.

It is an arithmetic number, because the mean of its divisors is an integer number (12491577).

Almost surely, 2^71380420 is an apocalyptic number.

It is an amenable number.

71380420 is an abundant number, since it is smaller than the sum of its proper divisors (78518504).

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

71380420 is a wasteful number, since it uses less digits than its factorization.

71380420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3569030 (or 3569028 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 71380420 is about 8448.6933901048. The cubic root of 71380420 is about 414.8200119479.

Adding to 71380420 its reverse (2408317), we get a palindrome (73788737).

The spelling of 71380420 in words is "seventy-one million, three hundred eighty thousand, four hundred twenty".