42977636 has 12 divisors (see below), whose sum is σ = 80996412. Its totient is φ = 19835808.

The previous prime is 42977633. The next prime is 42977657. The reversal of 42977636 is 63677924.

It is a happy number.

42977636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 26977636 + 16000000 = 5194^2 + 4000^2 .

It is a super-2 number, since 2×42977636² = 3694154392296992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42977633) 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 3 ways as a sum of consecutive naturals, for example, 413195 + ... + 413298.

It is an arithmetic number, because the mean of its divisors is an integer number (6749701).

Almost surely, 2^42977636 is an apocalyptic number.

It is an amenable number.

42977636 is a deficient number, since it is larger than the sum of its proper divisors (38018776).

42977636 is a wasteful number, since it uses less digits than its factorization.

42977636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826510 (or 826508 counting only the distinct ones).

The product of its digits is 381024, while the sum is 44.

The square root of 42977636 is about 6555.7330635101. The cubic root of 42977636 is about 350.2790590765.

It can be divided in two parts, 42977 and 636, that multiplied together give a palindrome (27333372).

The spelling of 42977636 in words is "forty-two million, nine hundred seventy-seven thousand, six hundred thirty-six".