40639935 has 16 divisors (see below), whose sum is σ = 74313216. Its totient is φ = 18578208.

The previous prime is 40639931. The next prime is 40639957. The reversal of 40639935 is 53993604.

It is not a de Polignac number, because 40639935 - 2² = 40639931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40639893 and 40639902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40639931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193419 + ... + 193628.

It is an arithmetic number, because the mean of its divisors is an integer number (4644576).

Almost surely, 2^40639935 is an apocalyptic number.

40639935 is a deficient number, since it is larger than the sum of its proper divisors (33673281).

40639935 is a wasteful number, since it uses less digits than its factorization.

40639935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387062.

The product of its (nonzero) digits is 87480, while the sum is 39.

The square root of 40639935 is about 6374.9458821232. The cubic root of 40639935 is about 343.8093380760.

The spelling of 40639935 in words is "forty million, six hundred thirty-nine thousand, nine hundred thirty-five".