28737944 has 8 divisors (see below), whose sum is σ = 53883660. Its totient is φ = 14368968.

The previous prime is 28737931. The next prime is 28737949. The reversal of 28737944 is 44973782.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 28737895 and 28737904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28737949) 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 as a sum of consecutive naturals, namely, 1796114 + ... + 1796129.

Almost surely, 2^28737944 is an apocalyptic number.

It is an amenable number.

28737944 is a deficient number, since it is larger than the sum of its proper divisors (25145716).

28737944 is a wasteful number, since it uses less digits than its factorization.

28737944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3592249 (or 3592245 counting only the distinct ones).

The product of its digits is 338688, while the sum is 44.

The square root of 28737944 is about 5360.7783017021. The cubic root of 28737944 is about 306.3034567798.

The spelling of 28737944 in words is "twenty-eight million, seven hundred thirty-seven thousand, nine hundred forty-four".