40490520 has 256 divisors, whose sum is σ = 152064000. Its totient is φ = 8418816.

The previous prime is 40490503. The next prime is 40490531. The reversal of 40490520 is 2509404.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 686251 + ... + 686309.

It is an arithmetic number, because the mean of its divisors is an integer number (594000).

Almost surely, 2^40490520 is an apocalyptic number.

40490520 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 40490520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76032000).

40490520 is an abundant number, since it is smaller than the sum of its proper divisors (111573480).

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

40490520 is a wasteful number, since it uses less digits than its factorization.

40490520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 40490520 is about 6363.2161679453. The cubic root of 40490520 is about 343.3874758824.

Adding to 40490520 its reverse (2509404), we get a palindrome (42999924).

The spelling of 40490520 in words is "forty million, four hundred ninety thousand, five hundred twenty".