53307728 has 10 divisors (see below), whose sum is σ = 103283754. Its totient is φ = 26653856.

The previous prime is 53307719. The next prime is 53307731. The reversal of 53307728 is 82770335.

It can be written as a sum of positive squares in only one way, i.e., 37847104 + 15460624 = 6152^2 + 3932^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1665851 + ... + 1665882.

Almost surely, 2^53307728 is an apocalyptic number.

It is an amenable number.

53307728 is a deficient number, since it is larger than the sum of its proper divisors (49976026).

53307728 is a wasteful number, since it uses less digits than its factorization.

53307728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3331741 (or 3331735 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 53307728 is about 7301.2141456062. The cubic root of 53307728 is about 376.3541630566.

The spelling of 53307728 in words is "fifty-three million, three hundred seven thousand, seven hundred twenty-eight".