71449928 has 16 divisors (see below), whose sum is σ = 146147760. Its totient is φ = 32477200.

The previous prime is 71449919. The next prime is 71449933. The reversal of 71449928 is 82994417.

It is a super-2 number, since 2×71449928² = 10210184422410368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405878 + ... + 406053.

It is an arithmetic number, because the mean of its divisors is an integer number (9134235).

Almost surely, 2^71449928 is an apocalyptic number.

It is an amenable number.

71449928 is an abundant number, since it is smaller than the sum of its proper divisors (74697832).

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

71449928 is a wasteful number, since it uses less digits than its factorization.

71449928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811948 (or 811944 counting only the distinct ones).

The product of its digits is 145152, while the sum is 44.

The square root of 71449928 is about 8452.8059246619. The cubic root of 71449928 is about 414.9546144783.

The spelling of 71449928 in words is "seventy-one million, four hundred forty-nine thousand, nine hundred twenty-eight".