61144238 has 16 divisors (see below), whose sum is σ = 95256000. Its totient is φ = 29400672.

The previous prime is 61144231. The next prime is 61144247. The reversal of 61144238 is 83244116.

It is a super-5 number, since 5×61144238⁵ (a number of 40 digits) contains 55555 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a self number, because there is not a number n which added to its sum of digits gives 61144238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61144231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13643 + ... + 17561.

It is an arithmetic number, because the mean of its divisors is an integer number (5953500).

Almost surely, 2^61144238 is an apocalyptic number.

61144238 is a deficient number, since it is larger than the sum of its proper divisors (34111762).

61144238 is a wasteful number, since it uses less digits than its factorization.

61144238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4219.

The product of its digits is 4608, while the sum is 29.

The square root of 61144238 is about 7819.4781155778. The cubic root of 61144238 is about 393.9597431964.

The spelling of 61144238 in words is "sixty-one million, one hundred forty-four thousand, two hundred thirty-eight".