61143888 has 40 divisors (see below), whose sum is σ = 170107168. Its totient is φ = 18813312.

The previous prime is 61143847. The next prime is 61143889. The reversal of 61143888 is 88834116.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61143889) 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, 48370 + ... + 49617.

Almost surely, 2^61143888 is an apocalyptic number.

It is an amenable number.

61143888 is an abundant number, since it is smaller than the sum of its proper divisors (108963280).

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

61143888 is a wasteful number, since it uses less digits than its factorization.

61143888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98011 (or 98005 counting only the distinct ones).

The product of its digits is 36864, while the sum is 39.

The square root of 61143888 is about 7819.4557355356. The cubic root of 61143888 is about 393.9589914975.

The spelling of 61143888 in words is "sixty-one million, one hundred forty-three thousand, eight hundred eighty-eight".