71928840 has 32 divisors (see below), whose sum is σ = 215786880. Its totient is φ = 19180992.

The previous prime is 71928839. The next prime is 71928841. The reversal of 71928840 is 4882917.

It is an interprime number because it is at equal distance from previous prime (71928839) and next prime (71928841).

It is not an unprimeable number, because it can be changed into a prime (71928841) 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, 299584 + ... + 299823.

It is an arithmetic number, because the mean of its divisors is an integer number (6743340).

Almost surely, 2^71928840 is an apocalyptic number.

It is an amenable number.

71928840 is an abundant number, since it is smaller than the sum of its proper divisors (143858040).

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

71928840 is a wasteful number, since it uses less digits than its factorization.

71928840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599421 (or 599417 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 71928840 is about 8481.0871944580. The cubic root of 71928840 is about 415.8796650219.

The spelling of 71928840 in words is "seventy-one million, nine hundred twenty-eight thousand, eight hundred forty".