28977744 has 40 divisors (see below), whose sum is σ = 75209472. Its totient is φ = 9614080.

The previous prime is 28977737. The next prime is 28977749. The reversal of 28977744 is 44777982.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 28977693 and 28977702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28977749) 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, 9889 + ... + 12479.

Almost surely, 2^28977744 is an apocalyptic number.

28977744 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28977744 is an abundant number, since it is smaller than the sum of its proper divisors (46231728).

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

28977744 is a wasteful number, since it uses less digits than its factorization.

28977744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2835 (or 2829 counting only the distinct ones).

The product of its digits is 790272, while the sum is 48.

The square root of 28977744 is about 5383.0979927919. The cubic root of 28977744 is about 307.1530676458.

The spelling of 28977744 in words is "twenty-eight million, nine hundred seventy-seven thousand, seven hundred forty-four".