28773400 has 48 divisors (see below), whose sum is σ = 68343840. Its totient is φ = 11260800.

The previous prime is 28773373. The next prime is 28773419. The reversal of 28773400 is 437782.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 7870 + ... + 10930.

It is an arithmetic number, because the mean of its divisors is an integer number (1423830).

Almost surely, 2^28773400 is an apocalyptic number.

28773400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28773400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34171920).

28773400 is an abundant number, since it is smaller than the sum of its proper divisors (39570440).

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

28773400 is a wasteful number, since it uses less digits than its factorization.

28773400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3124 (or 3115 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 28773400 is about 5364.0842648117. The cubic root of 28773400 is about 306.4293743014.

The spelling of 28773400 in words is "twenty-eight million, seven hundred seventy-three thousand, four hundred".