53257770 has 128 divisors (see below), whose sum is σ = 154586880. Its totient is φ = 12994560.

The previous prime is 53257769. The next prime is 53257781. The reversal of 53257770 is 7775235.

53257770 is a `hidden beast` number, since 532 + 57 + 7 + 70 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 188049 + ... + 188331.

It is an arithmetic number, because the mean of its divisors is an integer number (1207710).

Almost surely, 2^53257770 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53257770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77293440).

53257770 is an abundant number, since it is smaller than the sum of its proper divisors (101329110).

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

53257770 is a wasteful number, since it uses less digits than its factorization.

53257770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357 (or 351 counting only the distinct ones).

The product of its (nonzero) digits is 51450, while the sum is 36.

The square root of 53257770 is about 7297.7921318711. The cubic root of 53257770 is about 376.2365579831.

The spelling of 53257770 in words is "fifty-three million, two hundred fifty-seven thousand, seven hundred seventy".