28649510 has 16 divisors (see below), whose sum is σ = 51644736. Its totient is φ = 11443008.

The previous prime is 28649501. The next prime is 28649519. The reversal of 28649510 is 1594682.

It is an interprime number because it is at equal distance from previous prime (28649501) and next prime (28649519).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28649519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6899 + ... + 10241.

It is an arithmetic number, because the mean of its divisors is an integer number (3227796).

Almost surely, 2^28649510 is an apocalyptic number.

28649510 is a deficient number, since it is larger than the sum of its proper divisors (22995226).

28649510 is a wasteful number, since it uses less digits than its factorization.

28649510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4207.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 28649510 is about 5352.5237038242. The cubic root of 28649510 is about 305.9889425996.

The spelling of 28649510 in words is "twenty-eight million, six hundred forty-nine thousand, five hundred ten".