40490040 has 64 divisors (see below), whose sum is σ = 121888800. Its totient is φ = 10760192.

The previous prime is 40490033. The next prime is 40490053. The reversal of 40490040 is 4009404.

40490040 = T₃₁ + T₃₂ + ... + T₆₂₃.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 40489989 and 40490016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67984 + ... + 68576.

Almost surely, 2^40490040 is an apocalyptic number.

40490040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40490040 is an abundant number, since it is smaller than the sum of its proper divisors (81398760).

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

40490040 is a wasteful number, since it uses less digits than its factorization.

40490040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176 (or 1172 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 40490040 is about 6363.1784510573. The cubic root of 40490040 is about 343.3861189670.

Adding to 40490040 its reverse (4009404), we get a palindrome (44499444).

The spelling of 40490040 in words is "forty million, four hundred ninety thousand, forty".