53401340 has 12 divisors (see below), whose sum is σ = 112142856. Its totient is φ = 21360528.

The previous prime is 53401339. The next prime is 53401349. The reversal of 53401340 is 4310435.

It is a super-2 number, since 2×53401340² = 5703406227591200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 2670067 = 53401340 / (5 + 3 + 4 + 0 + 1 + 3 + 4 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53401349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1335014 + ... + 1335053.

It is an arithmetic number, because the mean of its divisors is an integer number (9345238).

Almost surely, 2^53401340 is an apocalyptic number.

It is an amenable number.

53401340 is an abundant number, since it is smaller than the sum of its proper divisors (58741516).

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

53401340 is a wasteful number, since it uses less digits than its factorization.

53401340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2670076 (or 2670074 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 53401340 is about 7307.6220482452. The cubic root of 53401340 is about 376.5743354062.

Adding to 53401340 its reverse (4310435), we get a palindrome (57711775).

The spelling of 53401340 in words is "fifty-three million, four hundred one thousand, three hundred forty".