28694988 has 54 divisors (see below), whose sum is σ = 84382116. Its totient is φ = 8198064.

The previous prime is 28694987. The next prime is 28694999. The reversal of 28694988 is 88949682.

It is not an unprimeable number, because it can be changed into a prime (28694987) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6370 + ... + 9897.

Almost surely, 2^28694988 is an apocalyptic number.

28694988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28694988 is an abundant number, since it is smaller than the sum of its proper divisors (55687128).

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

28694988 is a wasteful number, since it uses less digits than its factorization.

28694988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16291 (or 16279 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The square root of 28694988 is about 5356.7702956166. The cubic root of 28694988 is about 306.1507651271.

The spelling of 28694988 in words is "twenty-eight million, six hundred ninety-four thousand, nine hundred eighty-eight".