52689780 has 288 divisors, whose sum is σ = 198132480. Its totient is φ = 11151360.

The previous prime is 52689779. The next prime is 52689809. The reversal of 52689780 is 8798625.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 591976 + ... + 592064.

It is an arithmetic number, because the mean of its divisors is an integer number (687960).

Almost surely, 2^52689780 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 52689780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99066240).

52689780 is an abundant number, since it is smaller than the sum of its proper divisors (145442700).

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

52689780 is a wasteful number, since it uses less digits than its factorization.

52689780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 52689780 is about 7258.7726235225. The cubic root of 52689780 is about 374.8942635223.

The spelling of 52689780 in words is "fifty-two million, six hundred eighty-nine thousand, seven hundred eighty".