40840046 has 8 divisors (see below), whose sum is σ = 65972424. Its totient is φ = 18849240.

The previous prime is 40840043. The next prime is 40840073. The reversal of 40840046 is 64004804.

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

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 1570771 = 40840046 / (4 + 0 + 8 + 4 + 0 + 0 + 4 + 6).

It is a junction number, because it is equal to n+sod(n) for n = 40839997 and 40840024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40840043) 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, 785360 + ... + 785411.

It is an arithmetic number, because the mean of its divisors is an integer number (8246553).

Almost surely, 2^40840046 is an apocalyptic number.

40840046 is a deficient number, since it is larger than the sum of its proper divisors (25132378).

40840046 is a wasteful number, since it uses less digits than its factorization.

40840046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1570786.

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 40840046 is about 6390.6217224930. The cubic root of 40840046 is about 344.3727200023.

The spelling of 40840046 in words is "forty million, eight hundred forty thousand, forty-six".