61783944 has 32 divisors (see below), whose sum is σ = 157749120. Its totient is φ = 20156096.

The previous prime is 61783937. The next prime is 61783951. The reversal of 61783944 is 44938716.

It is an interprime number because it is at equal distance from previous prime (61783937) and next prime (61783951).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 61783896 and 61783905.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26259 + ... + 28514.

It is an arithmetic number, because the mean of its divisors is an integer number (4929660).

Almost surely, 2^61783944 is an apocalyptic number.

It is an amenable number.

61783944 is an abundant number, since it is smaller than the sum of its proper divisors (95965176).

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

61783944 is a wasteful number, since it uses less digits than its factorization.

61783944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54829 (or 54825 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 61783944 is about 7860.2763310204. The cubic root of 61783944 is about 395.3288806108.

The spelling of 61783944 in words is "sixty-one million, seven hundred eighty-three thousand, nine hundred forty-four".