40642520 has 64 divisors (see below), whose sum is σ = 98172000. Its totient is φ = 15095808.

The previous prime is 40642517. The next prime is 40642549. The reversal of 40642520 is 2524604.

40642520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 15 ways as a sum of consecutive naturals, for example, 39776 + ... + 40784.

Almost surely, 2^40642520 is an apocalyptic number.

40642520 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 40642520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49086000).

40642520 is an abundant number, since it is smaller than the sum of its proper divisors (57529480).

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

40642520 is a wasteful number, since it uses less digits than its factorization.

40642520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092 (or 1088 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 40642520 is about 6375.1486257185. The cubic root of 40642520 is about 343.8166275258.

The spelling of 40642520 in words is "forty million, six hundred forty-two thousand, five hundred twenty".