40638696 has 64 divisors (see below), whose sum is σ = 117780480. Its totient is φ = 11444160.

The previous prime is 40638673. The next prime is 40638727. The reversal of 40638696 is 69683604.

It is a super-2 number, since 2×40638696² = 3303007225160832, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10225 + ... + 13631.

It is an arithmetic number, because the mean of its divisors is an integer number (1840320).

Almost surely, 2^40638696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40638696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58890240).

40638696 is an abundant number, since it is smaller than the sum of its proper divisors (77141784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40638696 is a wasteful number, since it uses less digits than its factorization.

40638696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3494 (or 3490 counting only the distinct ones).

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

The square root of 40638696 is about 6374.8487040870. The cubic root of 40638696 is about 343.8058441064.

The spelling of 40638696 in words is "forty million, six hundred thirty-eight thousand, six hundred ninety-six".