28700646 has 16 divisors (see below), whose sum is σ = 61816944. Its totient is φ = 8830944.

The previous prime is 28700629. The next prime is 28700647. The reversal of 28700646 is 64600782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28700647) 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, 183901 + ... + 184056.

It is an arithmetic number, because the mean of its divisors is an integer number (3863559).

Almost surely, 2^28700646 is an apocalyptic number.

28700646 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28700646 is an abundant number, since it is smaller than the sum of its proper divisors (33116298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28700646 is a wasteful number, since it uses less digits than its factorization.

28700646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367975.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 28700646 is about 5357.2983863138. The cubic root of 28700646 is about 306.1708857975.

The spelling of 28700646 in words is "twenty-eight million, seven hundred thousand, six hundred forty-six".