42447977 has 16 divisors (see below), whose sum is σ = 50379840. Its totient is φ = 35256000.

The previous prime is 42447973. The next prime is 42447983. The reversal of 42447977 is 77974424.

It is a happy number.

42447977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42447977 - 2² = 42447973 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42447973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12974 + ... + 15912.

It is an arithmetic number, because the mean of its divisors is an integer number (3148740).

Almost surely, 2^42447977 is an apocalyptic number.

It is an amenable number.

42447977 is a deficient number, since it is larger than the sum of its proper divisors (7931863).

42447977 is a wasteful number, since it uses less digits than its factorization.

42447977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3064.

The product of its digits is 395136, while the sum is 44.

The square root of 42447977 is about 6515.2112014884. The cubic root of 42447977 is about 348.8341535422.

It can be divided in two parts, 4244 and 7977, that added together give a palindrome (12221).

The spelling of 42447977 in words is "forty-two million, four hundred forty-seven thousand, nine hundred seventy-seven".