28779413 has 8 divisors (see below), whose sum is σ = 31046400. Its totient is φ = 26520048.

The previous prime is 28779391. The next prime is 28779431. The reversal of 28779413 is 31497782.

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

It is a cyclic number.

It is not a de Polignac number, because 28779413 - 2⁶ = 28779349 is a prime.

It is a super-2 number, since 2×28779413² = 1656509225249138, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28779473) 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, 7808 + ... + 10886.

It is an arithmetic number, because the mean of its divisors is an integer number (3880800).

Almost surely, 2^28779413 is an apocalyptic number.

It is an amenable number.

28779413 is a deficient number, since it is larger than the sum of its proper divisors (2266987).

28779413 is a wasteful number, since it uses less digits than its factorization.

28779413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3811.

The product of its digits is 84672, while the sum is 41.

The square root of 28779413 is about 5364.6447226261. The cubic root of 28779413 is about 306.4507184536.

It can be divided in two parts, 28779 and 413, that added together give a palindrome (29192).

The spelling of 28779413 in words is "twenty-eight million, seven hundred seventy-nine thousand, four hundred thirteen".