61267638 has 8 divisors (see below), whose sum is σ = 122535288. Its totient is φ = 20422544.

The previous prime is 61267637. The next prime is 61267667. The reversal of 61267638 is 83676216.

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

61267638 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61267596 and 61267605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61267631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5105631 + ... + 5105642.

It is an arithmetic number, because the mean of its divisors is an integer number (15316911).

Almost surely, 2^61267638 is an apocalyptic number.

61267638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

61267638 is a wasteful number, since it uses less digits than its factorization.

61267638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10211278.

The product of its digits is 72576, while the sum is 39.

The square root of 61267638 is about 7827.3646906223. The cubic root of 61267638 is about 394.2245921622.

The spelling of 61267638 in words is "sixty-one million, two hundred sixty-seven thousand, six hundred thirty-eight".