28649701 has 4 divisors (see below), whose sum is σ = 30157600. Its totient is φ = 27141804.

The previous prime is 28649689. The next prime is 28649713. The reversal of 28649701 is 10794682.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (28649689) and next prime (28649713).

It is a de Polignac number, because none of the positive numbers 2^k-28649701 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 (28649741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 753921 + ... + 753958.

It is an arithmetic number, because the mean of its divisors is an integer number (7539400).

Almost surely, 2^28649701 is an apocalyptic number.

It is an amenable number.

28649701 is a deficient number, since it is larger than the sum of its proper divisors (1507899).

28649701 is a wasteful number, since it uses less digits than its factorization.

28649701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507898.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 28649701 is about 5352.5415458453. The cubic root of 28649701 is about 305.9896225851.

The spelling of 28649701 in words is "twenty-eight million, six hundred forty-nine thousand, seven hundred one".