42388678 has 16 divisors (see below), whose sum is σ = 66583296. Its totient is φ = 20200840.

The previous prime is 42388649. The next prime is 42388679. The reversal of 42388678 is 87688324.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42388679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12825 + ... + 15787.

It is an arithmetic number, because the mean of its divisors is an integer number (4161456).

Almost surely, 2^42388678 is an apocalyptic number.

42388678 is a deficient number, since it is larger than the sum of its proper divisors (24194618).

42388678 is a wasteful number, since it uses less digits than its factorization.

42388678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3299.

The product of its digits is 516096, while the sum is 46.

The square root of 42388678 is about 6510.6587992307. The cubic root of 42388678 is about 348.6716396618.

The spelling of 42388678 in words is "forty-two million, three hundred eighty-eight thousand, six hundred seventy-eight".