44778861 has 24 divisors (see below), whose sum is σ = 68028480. Its totient is φ = 28328256.

The previous prime is 44778809. The next prime is 44778887. The reversal of 44778861 is 16887744.

It is a de Polignac number, because none of the positive numbers 2^k-44778861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44778061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27570 + ... + 29148.

It is an arithmetic number, because the mean of its divisors is an integer number (2834520).

Almost surely, 2^44778861 is an apocalyptic number.

It is an amenable number.

44778861 is a deficient number, since it is larger than the sum of its proper divisors (23249619).

44778861 is a wasteful number, since it uses less digits than its factorization.

44778861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1745 (or 1742 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 44778861 is about 6691.7009048522. The cubic root of 44778861 is about 355.1057305911.

The spelling of 44778861 in words is "forty-four million, seven hundred seventy-eight thousand, eight hundred sixty-one".