76728933 has 12 divisors (see below), whose sum is σ = 110967948. Its totient is φ = 51089280.

The previous prime is 76728931. The next prime is 76728959. The reversal of 76728933 is 33982767.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 32012964 + 44715969 = 5658^2 + 6687^2 .

It is not a de Polignac number, because 76728933 - 2¹ = 76728931 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76728931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3091 + ... + 12767.

It is an arithmetic number, because the mean of its divisors is an integer number (9247329).

Almost surely, 2^76728933 is an apocalyptic number.

It is an amenable number.

76728933 is a deficient number, since it is larger than the sum of its proper divisors (34239015).

76728933 is a wasteful number, since it uses less digits than its factorization.

76728933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10564 (or 10561 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 76728933 is about 8759.5052942504. The cubic root of 76728933 is about 424.9322761753.

The spelling of 76728933 in words is "seventy-six million, seven hundred twenty-eight thousand, nine hundred thirty-three".