53757440 has 160 divisors (see below), whose sum is σ = 148490496. Its totient is φ = 18472960.

The previous prime is 53757433. The next prime is 53757491. The reversal of 53757440 is 4475735.

It is a tau number, because it is divible by the number of its divisors (160).

It is a self number, because there is not a number n which added to its sum of digits gives 53757440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 647639 + ... + 647721.

Almost surely, 2^53757440 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 53757440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74245248).

53757440 is an abundant number, since it is smaller than the sum of its proper divisors (94733056).

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

53757440 is a wasteful number, since it uses less digits than its factorization.

53757440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 35.

The square root of 53757440 is about 7331.9465355388. The cubic root of 53757440 is about 377.4095276077.

The spelling of 53757440 in words is "fifty-three million, seven hundred fifty-seven thousand, four hundred forty".