61285389 has 16 divisors (see below), whose sum is σ = 89411904. Its totient is φ = 37030400.

The previous prime is 61285379. The next prime is 61285417. The reversal of 61285389 is 98358216.

It is a de Polignac number, because none of the positive numbers 2^k-61285389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61285389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61285379) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9019 + ... + 14279.

It is an arithmetic number, because the mean of its divisors is an integer number (5588244).

Almost surely, 2^61285389 is an apocalyptic number.

It is an amenable number.

61285389 is a deficient number, since it is larger than the sum of its proper divisors (28126515).

61285389 is a wasteful number, since it uses less digits than its factorization.

61285389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5628.

The product of its digits is 103680, while the sum is 42.

The square root of 61285389 is about 7828.4985150411. The cubic root of 61285389 is about 394.2626612268.

The spelling of 61285389 in words is "sixty-one million, two hundred eighty-five thousand, three hundred eighty-nine".