28771344 has 240 divisors, whose sum is σ = 103064832. Its totient is φ = 7299072.

The previous prime is 28771333. The next prime is 28771363. The reversal of 28771344 is 44317782.

28771344 = T₁₂₇ + T₁₂₈ + ... + T₅₅₈.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 28771299 and 28771308.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 394092 + ... + 394164.

Almost surely, 2^28771344 is an apocalyptic number.

28771344 is a gapful number since it is divisible by the number (24) 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 28771344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51532416).

28771344 is an abundant number, since it is smaller than the sum of its proper divisors (74293488).

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

28771344 is a wasteful number, since it uses less digits than its factorization.

28771344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 125 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 28771344 is about 5363.8926163748. The cubic root of 28771344 is about 306.4220755023.

It can be divided in two parts, 287 and 71344, that added together give a triangular number (71631 = T₃₇₈).

The spelling of 28771344 in words is "twenty-eight million, seven hundred seventy-one thousand, three hundred forty-four".