40633638 has 16 divisors (see below), whose sum is σ = 86047920. Its totient is φ = 12747776.

The previous prime is 40633627. The next prime is 40633639. The reversal of 40633638 is 83633604.

It is a junction number, because it is equal to n+sod(n) for n = 40633599 and 40633608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40633639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199083 + ... + 199286.

It is an arithmetic number, because the mean of its divisors is an integer number (5377995).

Almost surely, 2^40633638 is an apocalyptic number.

40633638 is an abundant number, since it is smaller than the sum of its proper divisors (45414282).

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

40633638 is a wasteful number, since it uses less digits than its factorization.

40633638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398391.

The product of its (nonzero) digits is 31104, while the sum is 33.

The square root of 40633638 is about 6374.4519764447. The cubic root of 40633638 is about 343.7915798519.

The spelling of 40633638 in words is "forty million, six hundred thirty-three thousand, six hundred thirty-eight".