53085780 has 168 divisors, whose sum is σ = 182889504. Its totient is φ = 12830400.

The previous prime is 53085763. The next prime is 53085797. The reversal of 53085780 is 8758035.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (53085763) and next prime (53085797).

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

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 160215 + ... + 160545.

It is an arithmetic number, because the mean of its divisors is an integer number (1088628).

Almost surely, 2^53085780 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 53085780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91444752).

53085780 is an abundant number, since it is smaller than the sum of its proper divisors (129803724).

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

53085780 is a wasteful number, since it uses less digits than its factorization.

53085780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369 (or 352 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 53085780 is about 7285.9989020038. The cubic root of 53085780 is about 375.8311166263.

The spelling of 53085780 in words is "fifty-three million, eighty-five thousand, seven hundred eighty".