40640246 has 8 divisors (see below), whose sum is σ = 62378184. Its totient is φ = 19847520.

The previous prime is 40640239. The next prime is 40640311. The reversal of 40640246 is 64204604.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236195 + ... + 236366.

It is an arithmetic number, because the mean of its divisors is an integer number (7797273).

Almost surely, 2^40640246 is an apocalyptic number.

40640246 is a deficient number, since it is larger than the sum of its proper divisors (21737938).

40640246 is a wasteful number, since it uses less digits than its factorization.

40640246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472606.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 40640246 is about 6374.9702744405. The cubic root of 40640246 is about 343.8102150823.

The spelling of 40640246 in words is "forty million, six hundred forty thousand, two hundred forty-six".