42740678 has 4 divisors (see below), whose sum is σ = 64111020. Its totient is φ = 21370338.

The previous prime is 42740657. The next prime is 42740681. The reversal of 42740678 is 87604724.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10685168 + ... + 10685171.

It is an arithmetic number, because the mean of its divisors is an integer number (16027755).

Almost surely, 2^42740678 is an apocalyptic number.

42740678 is a deficient number, since it is larger than the sum of its proper divisors (21370342).

42740678 is a wasteful number, since it uses less digits than its factorization.

42740678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21370341.

The product of its (nonzero) digits is 75264, while the sum is 38.

The square root of 42740678 is about 6537.6355052878. The cubic root of 42740678 is about 349.6341156028.

The spelling of 42740678 in words is "forty-two million, seven hundred forty thousand, six hundred seventy-eight".