71379864 has 24 divisors (see below), whose sum is σ = 193320660. Its totient is φ = 23793264.

The previous prime is 71379863. The next prime is 71379881. The reversal of 71379864 is 46897317.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71379863) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 495622 + ... + 495765.

Almost surely, 2^71379864 is an apocalyptic number.

It is an amenable number.

71379864 is an abundant number, since it is smaller than the sum of its proper divisors (121940796).

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

71379864 is a wasteful number, since it uses less digits than its factorization.

71379864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991399 (or 991392 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 71379864 is about 8448.6604855444. The cubic root of 71379864 is about 414.8189348994.

The spelling of 71379864 in words is "seventy-one million, three hundred seventy-nine thousand, eight hundred sixty-four".