71539470 has 32 divisors (see below), whose sum is σ = 190772640. Its totient is φ = 19077120.

The previous prime is 71539439. The next prime is 71539471. The reversal of 71539470 is 7493517.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71539471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132211 + ... + 132750.

It is an arithmetic number, because the mean of its divisors is an integer number (5961645).

Almost surely, 2^71539470 is an apocalyptic number.

71539470 is an abundant number, since it is smaller than the sum of its proper divisors (119233170).

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

71539470 is a wasteful number, since it uses less digits than its factorization.

71539470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264977 (or 264971 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 71539470 is about 8458.1008506638. The cubic root of 71539470 is about 415.1278843309.

The spelling of 71539470 in words is "seventy-one million, five hundred thirty-nine thousand, four hundred seventy".