53780856 has 32 divisors (see below), whose sum is σ = 135239760. Its totient is φ = 17821952.

The previous prime is 53780851. The next prime is 53780861. The reversal of 53780856 is 65808735.

It is an interprime number because it is at equal distance from previous prime (53780851) and next prime (53780861).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53780851) 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, 2325 + ... + 10628.

Almost surely, 2^53780856 is an apocalyptic number.

It is an amenable number.

53780856 is an abundant number, since it is smaller than the sum of its proper divisors (81458904).

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

53780856 is a wasteful number, since it uses less digits than its factorization.

53780856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13135 (or 13131 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The square root of 53780856 is about 7333.5432091179. The cubic root of 53780856 is about 377.4643177828.

The spelling of 53780856 in words is "fifty-three million, seven hundred eighty thousand, eight hundred fifty-six".