53574640 has 120 divisors (see below), whose sum is σ = 147579840. Its totient is φ = 18031104.

The previous prime is 53574637. The next prime is 53574643. The reversal of 53574640 is 4647535.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (53574637) and next prime (53574643).

It is a super-2 number, since 2×53574640² = 5740484102259200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 53574596 and 53574605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53574643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 309594 + ... + 309766.

It is an arithmetic number, because the mean of its divisors is an integer number (1229832).

Almost surely, 2^53574640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53574640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73789920).

53574640 is an abundant number, since it is smaller than the sum of its proper divisors (94005200).

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

53574640 is a wasteful number, since it uses less digits than its factorization.

53574640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 34.

The square root of 53574640 is about 7319.4699261627. The cubic root of 53574640 is about 376.9812531867.

The spelling of 53574640 in words is "fifty-three million, five hundred seventy-four thousand, six hundred forty".