28049679 has 16 divisors (see below), whose sum is σ = 47491840. Its totient is φ = 16028280.

The previous prime is 28049653. The next prime is 28049683. The reversal of 28049679 is 97694082.

It is a happy number.

It is not a de Polignac number, because 28049679 - 2⁷ = 28049551 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 (28049639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74017 + ... + 74394.

It is an arithmetic number, because the mean of its divisors is an integer number (2968240).

Almost surely, 2^28049679 is an apocalyptic number.

28049679 is a deficient number, since it is larger than the sum of its proper divisors (19442161).

28049679 is a wasteful number, since it uses less digits than its factorization.

28049679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148427 (or 148421 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 28049679 is about 5296.1947660561. The cubic root of 28049679 is about 303.8383800130.

The spelling of 28049679 in words is "twenty-eight million, forty-nine thousand, six hundred seventy-nine".