40634040 has 64 divisors (see below), whose sum is σ = 124221600. Its totient is φ = 10629632.

The previous prime is 40634021. The next prime is 40634053. The reversal of 40634040 is 4043604.

It is a super-2 number, since 2×40634040² = 3302250413443200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40633998 and 40634016.

It is a congruent number.

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, 3166 + ... + 9554.

Almost surely, 2^40634040 is an apocalyptic number.

40634040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40634040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62110800).

40634040 is an abundant number, since it is smaller than the sum of its proper divisors (83587560).

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

40634040 is a wasteful number, since it uses less digits than its factorization.

40634040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6456 (or 6452 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 40634040 is about 6374.4835084891. The cubic root of 40634040 is about 343.7927135904.

Adding to 40634040 its reverse (4043604), we get a palindrome (44677644).

The spelling of 40634040 in words is "forty million, six hundred thirty-four thousand, forty".