71489928 has 32 divisors (see below), whose sum is σ = 179186400. Its totient is φ = 23768448.

The previous prime is 71489927. The next prime is 71489933. The reversal of 71489928 is 82998417.

It is a super-2 number, since 2×71489928² = 10221619610890368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71489927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6175 + ... + 13457.

It is an arithmetic number, because the mean of its divisors is an integer number (5599575).

Almost surely, 2^71489928 is an apocalyptic number.

It is an amenable number.

71489928 is an abundant number, since it is smaller than the sum of its proper divisors (107696472).

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

71489928 is a wasteful number, since it uses less digits than its factorization.

71489928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7701 (or 7697 counting only the distinct ones).

The product of its digits is 290304, while the sum is 48.

The square root of 71489928 is about 8455.1716718231. The cubic root of 71489928 is about 415.0320350748.

The spelling of 71489928 in words is "seventy-one million, four hundred eighty-nine thousand, nine hundred twenty-eight".