71774648 has 16 divisors (see below), whose sum is σ = 146811960. Its totient is φ = 32624800.

The previous prime is 71774639. The next prime is 71774657. The reversal of 71774648 is 84647717.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (71774639) and next prime (71774657).

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

It is a junction number, because it is equal to n+sod(n) for n = 71774599 and 71774608.

It is a congruent number.

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, 407723 + ... + 407898.

Almost surely, 2^71774648 is an apocalyptic number.

It is an amenable number.

71774648 is an abundant number, since it is smaller than the sum of its proper divisors (75037312).

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

71774648 is a wasteful number, since it uses less digits than its factorization.

71774648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815638 (or 815634 counting only the distinct ones).

The product of its digits is 263424, while the sum is 44.

The square root of 71774648 is about 8471.9919735562. The cubic root of 71774648 is about 415.5822822511.

The spelling of 71774648 in words is "seventy-one million, seven hundred seventy-four thousand, six hundred forty-eight".