71976440 has 32 divisors (see below), whose sum is σ = 162812160. Its totient is φ = 28636800.

The previous prime is 71976431. The next prime is 71976449. The reversal of 71976440 is 4467917.

It is an interprime number because it is at equal distance from previous prime (71976431) and next prime (71976449).

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 71976394 and 71976403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71976449) 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, 2930 + ... + 12350.

It is an arithmetic number, because the mean of its divisors is an integer number (5087880).

Almost surely, 2^71976440 is an apocalyptic number.

It is an amenable number.

71976440 is an abundant number, since it is smaller than the sum of its proper divisors (90835720).

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

71976440 is a wasteful number, since it uses less digits than its factorization.

71976440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9623 (or 9619 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 71976440 is about 8483.8929743367. The cubic root of 71976440 is about 415.9713830167.

The spelling of 71976440 in words is "seventy-one million, nine hundred seventy-six thousand, four hundred forty".