28978554 has 32 divisors (see below), whose sum is σ = 64774080. Its totient is φ = 8566400.

The previous prime is 28978519. The next prime is 28978559. The reversal of 28978554 is 45587982.

It is not an unprimeable number, because it can be changed into a prime (28978559) 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, 2649 + ... + 8060.

It is an arithmetic number, because the mean of its divisors is an integer number (2024190).

Almost surely, 2^28978554 is an apocalyptic number.

28978554 is an abundant number, since it is smaller than the sum of its proper divisors (35795526).

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

28978554 is a wasteful number, since it uses less digits than its factorization.

28978554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10766.

The product of its digits is 806400, while the sum is 48.

The square root of 28978554 is about 5383.1732277533. The cubic root of 28978554 is about 307.1559295165.

The spelling of 28978554 in words is "twenty-eight million, nine hundred seventy-eight thousand, five hundred fifty-four".