76721748 has 48 divisors (see below), whose sum is σ = 192253824. Its totient is φ = 23726080.

The previous prime is 76721693. The next prime is 76721779. The reversal of 76721748 is 84712767.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11836 + ... + 17132.

It is an arithmetic number, because the mean of its divisors is an integer number (4005288).

Almost surely, 2^76721748 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 76721748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96126912).

76721748 is an abundant number, since it is smaller than the sum of its proper divisors (115532076).

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

76721748 is a wasteful number, since it uses less digits than its factorization.

76721748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5392 (or 5390 counting only the distinct ones).

The product of its digits is 131712, while the sum is 42.

The square root of 76721748 is about 8759.0951587478. The cubic root of 76721748 is about 424.9190120189.

The spelling of 76721748 in words is "seventy-six million, seven hundred twenty-one thousand, seven hundred forty-eight".