61839444 has 24 divisors (see below), whose sum is σ = 144571168. Its totient is φ = 20573280.

The previous prime is 61839443. The next prime is 61839457. The reversal of 61839444 is 44493816.

It is a happy number.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61839443) 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, 1854 + ... + 11274.

Almost surely, 2^61839444 is an apocalyptic number.

It is an amenable number.

61839444 is an abundant number, since it is smaller than the sum of its proper divisors (82731724).

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

61839444 is a wasteful number, since it uses less digits than its factorization.

61839444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9975 (or 9973 counting only the distinct ones).

The product of its digits is 82944, while the sum is 39.

The square root of 61839444 is about 7863.8059487757. The cubic root of 61839444 is about 395.4472187259.

The spelling of 61839444 in words is "sixty-one million, eight hundred thirty-nine thousand, four hundred forty-four".