52780861 has 8 divisors (see below), whose sum is σ = 60557760. Its totient is φ = 45063168.

The previous prime is 52780843. The next prime is 52780891. The reversal of 52780861 is 16808725.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 52780861 - 2⁵ = 52780829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52780861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52780811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12871 + ... + 16468.

It is an arithmetic number, because the mean of its divisors is an integer number (7569720).

Almost surely, 2^52780861 is an apocalyptic number.

It is an amenable number.

52780861 is a deficient number, since it is larger than the sum of its proper divisors (7776899).

52780861 is a wasteful number, since it uses less digits than its factorization.

52780861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29603.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 52780861 is about 7265.0437713754. The cubic root of 52780861 is about 375.1101566752.

The spelling of 52780861 in words is "fifty-two million, seven hundred eighty thousand, eight hundred sixty-one".