40791278 has 12 divisors (see below), whose sum is σ = 67255440. Its totient is φ = 18541380.

The previous prime is 40791251. The next prime is 40791287. The reversal of 40791278 is 87219704.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 84038 + ... + 84521.

It is an arithmetic number, because the mean of its divisors is an integer number (5604620).

Almost surely, 2^40791278 is an apocalyptic number.

40791278 is a deficient number, since it is larger than the sum of its proper divisors (26464162).

40791278 is a wasteful number, since it uses less digits than its factorization.

40791278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168583 (or 168572 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 40791278 is about 6386.8049915431. The cubic root of 40791278 is about 344.2355910506.

The spelling of 40791278 in words is "forty million, seven hundred ninety-one thousand, two hundred seventy-eight".