61869738 has 128 divisors (see below), whose sum is σ = 159989760. Its totient is φ = 15552000.

The previous prime is 61869727. The next prime is 61869751. The reversal of 61869738 is 83796816.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1014228 + ... + 1014288.

It is an arithmetic number, because the mean of its divisors is an integer number (1249920).

Almost surely, 2^61869738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61869738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79994880).

61869738 is an abundant number, since it is smaller than the sum of its proper divisors (98120022).

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

61869738 is a wasteful number, since it uses less digits than its factorization.

61869738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164.

The product of its digits is 435456, while the sum is 48.

The square root of 61869738 is about 7865.7318794884. The cubic root of 61869738 is about 395.5117822773.

The spelling of 61869738 in words is "sixty-one million, eight hundred sixty-nine thousand, seven hundred thirty-eight".