53428791 has 8 divisors (see below), whose sum is σ = 76718320. Its totient is φ = 32879232.

The previous prime is 53428789. The next prime is 53428813. The reversal of 53428791 is 19782435.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 53428791 - 2¹ = 53428789 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 1369969 = 53428791 / (5 + 3 + 4 + 2 + 8 + 7 + 9 + 1).

It is the 7310-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53428721) by changing a digit.

It is a nontrivial repunit in base 7309.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 684946 + ... + 685023.

It is an arithmetic number, because the mean of its divisors is an integer number (9589790).

Almost surely, 2^53428791 is an apocalyptic number.

53428791 is a deficient number, since it is larger than the sum of its proper divisors (23289529).

53428791 is a wasteful number, since it uses less digits than its factorization.

53428791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369985.

The product of its digits is 60480, while the sum is 39.

The square root of 53428791 is about 7309.5000513031. The cubic root of 53428791 is about 376.6388504619.

The spelling of 53428791 in words is "fifty-three million, four hundred twenty-eight thousand, seven hundred ninety-one".