42639877 has 16 divisors (see below), whose sum is σ = 50448384. Its totient is φ = 35280000.

The previous prime is 42639871. The next prime is 42639887. The reversal of 42639877 is 77893624.

It is not a de Polignac number, because 42639877 - 2¹⁹ = 42115589 is a prime.

It is a super-2 number, since 2×42639877² = 3636318221150258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42639871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28252 + ... + 29722.

It is an arithmetic number, because the mean of its divisors is an integer number (3153024).

Almost surely, 2^42639877 is an apocalyptic number.

It is an amenable number.

42639877 is a deficient number, since it is larger than the sum of its proper divisors (7808507).

42639877 is a wasteful number, since it uses less digits than its factorization.

42639877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620.

The product of its digits is 508032, while the sum is 46.

The square root of 42639877 is about 6529.9216687492. The cubic root of 42639877 is about 349.3590364281.

The spelling of 42639877 in words is "forty-two million, six hundred thirty-nine thousand, eight hundred seventy-seven".