28743957 has 32 divisors (see below), whose sum is σ = 49196160. Its totient is φ = 16392960.

The previous prime is 28743947. The next prime is 28743961. The reversal of 28743957 is 75934782.

It is not a de Polignac number, because 28743957 - 2¹⁶ = 28678421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28743937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2203 + ... + 7895.

It is an arithmetic number, because the mean of its divisors is an integer number (1537380).

Almost surely, 2^28743957 is an apocalyptic number.

28743957 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28743957 is a deficient number, since it is larger than the sum of its proper divisors (20452203).

28743957 is a wasteful number, since it uses less digits than its factorization.

28743957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5730 (or 5724 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 28743957 is about 5361.3391051117. The cubic root of 28743957 is about 306.3248184824.

It can be divided in two parts, 287439 and 57, that added together give a cube (287496 = 66³).

The spelling of 28743957 in words is "twenty-eight million, seven hundred forty-three thousand, nine hundred fifty-seven".