40078426 has 8 divisors (see below), whose sum is σ = 60550560. Its totient is φ = 19894908.

The previous prime is 40078421. The next prime is 40078427. The reversal of 40078426 is 62487004.

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

It is not an unprimeable number, because it can be changed into a prime (40078421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71806 + ... + 72361.

It is an arithmetic number, because the mean of its divisors is an integer number (7568820).

Almost surely, 2^40078426 is an apocalyptic number.

40078426 is a deficient number, since it is larger than the sum of its proper divisors (20472134).

40078426 is a wasteful number, since it uses less digits than its factorization.

40078426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144308.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 40078426 is about 6330.7524039406. The cubic root of 40078426 is about 342.2185543746.

It can be divided in two parts, 40078 and 426, that added together give a palindrome (40504).

The spelling of 40078426 in words is "forty million, seventy-eight thousand, four hundred twenty-six".