61138386 has 24 divisors (see below), whose sum is σ = 136740864. Its totient is φ = 19721880.

The previous prime is 61138379. The next prime is 61138391. The reversal of 61138386 is 68383116.

61138386 is a `hidden beast` number, since 611 + 3 + 8 + 38 + 6 = 666.

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 61138386.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54226 + ... + 55341.

It is an arithmetic number, because the mean of its divisors is an integer number (5697536).

Almost surely, 2^61138386 is an apocalyptic number.

61138386 is an abundant number, since it is smaller than the sum of its proper divisors (75602478).

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

61138386 is a wasteful number, since it uses less digits than its factorization.

61138386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109606 (or 109603 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 61138386 is about 7819.1039128534. The cubic root of 61138386 is about 393.9471744134.

The spelling of 61138386 in words is "sixty-one million, one hundred thirty-eight thousand, three hundred eighty-six".