53547780 has 144 divisors (see below), whose sum is σ = 178403904. Its totient is φ = 11831040.

The previous prime is 53547761. The next prime is 53547787. The reversal of 53547780 is 8774535.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53547787) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 677781 + ... + 677859.

It is an arithmetic number, because the mean of its divisors is an integer number (1238916).

Almost surely, 2^53547780 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 53547780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89201952).

53547780 is an abundant number, since it is smaller than the sum of its proper divisors (124856124).

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

53547780 is a wasteful number, since it uses less digits than its factorization.

53547780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 39.

The square root of 53547780 is about 7317.6348638067. The cubic root of 53547780 is about 376.9182419739.

The spelling of 53547780 in words is "fifty-three million, five hundred forty-seven thousand, seven hundred eighty".