61886385 has 96 divisors (see below), whose sum is σ = 125199360. Its totient is φ = 27993600.

The previous prime is 61886381. The next prime is 61886389. The reversal of 61886385 is 58368816.

61886385 is a `hidden beast` number, since 6 + 1 + 8 + 8 + 638 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (61886381) and next prime (61886389).

It is not a de Polignac number, because 61886385 - 2² = 61886381 is a prime.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61886385.

It is not an unprimeable number, because it can be changed into a prime (61886381) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 567711 + ... + 567819.

It is an arithmetic number, because the mean of its divisors is an integer number (1304160).

Almost surely, 2^61886385 is an apocalyptic number.

It is an amenable number.

61886385 is an abundant number, since it is smaller than the sum of its proper divisors (63312975).

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

61886385 is a wasteful number, since it uses less digits than its factorization.

61886385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 196 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 61886385 is about 7866.7900060952. The cubic root of 61886385 is about 395.5472519292.

It can be divided in two parts, 61 and 886385, that added together give a triangular number (886446 = T₁₃₃₁).

The spelling of 61886385 in words is "sixty-one million, eight hundred eighty-six thousand, three hundred eighty-five".