28767629 has 6 divisors (see below), whose sum is σ = 31620750. Its totient is φ = 26152280.

The previous prime is 28767617. The next prime is 28767631. The reversal of 28767629 is 92676782.

It can be written as a sum of positive squares in only one way, i.e., 25270729 + 3496900 = 5027^2 + 1870^2 .

It is a de Polignac number, because none of the positive numbers 2^k-28767629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28767649) 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, 118754 + ... + 118995.

It is an arithmetic number, because the mean of its divisors is an integer number (5270125).

Almost surely, 2^28767629 is an apocalyptic number.

It is an amenable number.

28767629 is a deficient number, since it is larger than the sum of its proper divisors (2853121).

28767629 is a wasteful number, since it uses less digits than its factorization.

28767629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237771 (or 237760 counting only the distinct ones).

The product of its digits is 508032, while the sum is 47.

The square root of 28767629 is about 5363.5463081808. The cubic root of 28767629 is about 306.4088863720.

The spelling of 28767629 in words is "twenty-eight million, seven hundred sixty-seven thousand, six hundred twenty-nine".