40642040 has 16 divisors (see below), whose sum is σ = 91444680. Its totient is φ = 16256800.

The previous prime is 40642039. The next prime is 40642051. The reversal of 40642040 is 4024604.

40642040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 507986 + ... + 508065.

Almost surely, 2^40642040 is an apocalyptic number.

40642040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40642040 is an abundant number, since it is smaller than the sum of its proper divisors (50802640).

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

40642040 is a wasteful number, since it uses less digits than its factorization.

40642040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016062 (or 1016058 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 40642040 is about 6375.1109794262. The cubic root of 40642040 is about 343.8152739957.

Adding to 40642040 its reverse (4024604), we get a palindrome (44666644).

The spelling of 40642040 in words is "forty million, six hundred forty-two thousand, forty".