28631769 has 8 divisors (see below), whose sum is σ = 38476800. Its totient is φ = 18937296.

The previous prime is 28631731. The next prime is 28631773. The reversal of 28631769 is 96713682.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28631769 - 2¹⁹ = 28107481 is a prime.

It is a super-2 number, since 2×28631769² = 1639556392138722, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28631769.

It is not an unprimeable number, because it can be changed into a prime (28631719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37194 + ... + 37955.

It is an arithmetic number, because the mean of its divisors is an integer number (4809600).

Almost surely, 2^28631769 is an apocalyptic number.

It is an amenable number.

28631769 is a deficient number, since it is larger than the sum of its proper divisors (9845031).

28631769 is a wasteful number, since it uses less digits than its factorization.

28631769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75279.

The product of its digits is 108864, while the sum is 42.

The square root of 28631769 is about 5350.8661915619. The cubic root of 28631769 is about 305.9257690846.

The spelling of 28631769 in words is "twenty-eight million, six hundred thirty-one thousand, seven hundred sixty-nine".