42787678 has 8 divisors (see below), whose sum is σ = 64420920. Its totient is φ = 21314040.

The previous prime is 42787643. The next prime is 42787687. The reversal of 42787678 is 87678724.

It is a happy number.

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

It is a congruent number.

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, 39228 + ... + 40303.

It is an arithmetic number, because the mean of its divisors is an integer number (8052615).

Almost surely, 2^42787678 is an apocalyptic number.

42787678 is a deficient number, since it is larger than the sum of its proper divisors (21633242).

42787678 is a wasteful number, since it uses less digits than its factorization.

42787678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79802.

The product of its digits is 1053696, while the sum is 49.

The square root of 42787678 is about 6541.2290893990. The cubic root of 42787678 is about 349.7622276216.

The spelling of 42787678 in words is "forty-two million, seven hundred eighty-seven thousand, six hundred seventy-eight".