53709570 has 72 divisors (see below), whose sum is σ = 144557244. Its totient is φ = 13825728.

The previous prime is 53709559. The next prime is 53709571. The reversal of 53709570 is 7590735.

It can be written as a sum of positive squares in 2 ways, for example, as 52403121 + 1306449 = 7239^2 + 1143^2 .

It is not an unprimeable number, because it can be changed into a prime (53709571) 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 in 35 ways as a sum of consecutive naturals, for example, 422847 + ... + 422973.

Almost surely, 2^53709570 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53709570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72278622).

53709570 is an abundant number, since it is smaller than the sum of its proper divisors (90847674).

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

53709570 is a wasteful number, since it uses less digits than its factorization.

53709570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 33075, while the sum is 36.

The square root of 53709570 is about 7328.6813274968. The cubic root of 53709570 is about 377.2974689519.

The spelling of 53709570 in words is "fifty-three million, seven hundred nine thousand, five hundred seventy".