42787634 has 8 divisors (see below), whose sum is σ = 64212588. Its totient is φ = 21383440.

The previous prime is 42787627. The next prime is 42787643. The reversal of 42787634 is 43678724.

It can be written as a sum of positive squares in 2 ways, for example, as 32205625 + 10582009 = 5675^2 + 3253^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 42787591 and 42787600.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1904 + ... + 9444.

Almost surely, 2^42787634 is an apocalyptic number.

42787634 is a deficient number, since it is larger than the sum of its proper divisors (21424954).

42787634 is a wasteful number, since it uses less digits than its factorization.

42787634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10380.

The product of its digits is 225792, while the sum is 41.

The square root of 42787634 is about 6541.2257261159. The cubic root of 42787634 is about 349.7621077309.

The spelling of 42787634 in words is "forty-two million, seven hundred eighty-seven thousand, six hundred thirty-four".