40646949 has 32 divisors (see below), whose sum is σ = 67205376. Its totient is φ = 21319680.

The previous prime is 40646939. The next prime is 40646959. The reversal of 40646949 is 94964604.

It is an interprime number because it is at equal distance from previous prime (40646939) and next prime (40646959).

It is not a de Polignac number, because 40646949 - 2⁴ = 40646933 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40646949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40646939) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13249 + ... + 16025.

It is an arithmetic number, because the mean of its divisors is an integer number (2100168).

Almost surely, 2^40646949 is an apocalyptic number.

It is an amenable number.

40646949 is a deficient number, since it is larger than the sum of its proper divisors (26558427).

40646949 is a wasteful number, since it uses less digits than its factorization.

40646949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2845.

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 40646949 is about 6375.4959807061. The cubic root of 40646949 is about 343.8291161587.

The spelling of 40646949 in words is "forty million, six hundred forty-six thousand, nine hundred forty-nine".