71489544 has 32 divisors (see below), whose sum is σ = 204256320. Its totient is φ = 20425536.

The previous prime is 71489501. The next prime is 71489617. The reversal of 71489544 is 44598417.

It is a super-2 number, since 2×71489544² = 10221509802655872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 71489496 and 71489505.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212599 + ... + 212934.

It is an arithmetic number, because the mean of its divisors is an integer number (6383010).

Almost surely, 2^71489544 is an apocalyptic number.

It is an amenable number.

71489544 is an abundant number, since it is smaller than the sum of its proper divisors (132766776).

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

71489544 is a wasteful number, since it uses less digits than its factorization.

71489544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425549 (or 425545 counting only the distinct ones).

The product of its digits is 161280, while the sum is 42.

The square root of 71489544 is about 8455.1489637971. The cubic root of 71489544 is about 415.0312919744.

The spelling of 71489544 in words is "seventy-one million, four hundred eighty-nine thousand, five hundred forty-four".