40420540 has 24 divisors (see below), whose sum is σ = 85009680. Its totient is φ = 16144128.

The previous prime is 40420531. The next prime is 40420553. The reversal of 40420540 is 4502404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19179 + ... + 21181.

It is an arithmetic number, because the mean of its divisors is an integer number (3542070).

Almost surely, 2^40420540 is an apocalyptic number.

It is an amenable number.

40420540 is an abundant number, since it is smaller than the sum of its proper divisors (44589140).

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

40420540 is a wasteful number, since it uses less digits than its factorization.

40420540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3021 (or 3019 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 40420540 is about 6357.7149983308. The cubic root of 40420540 is about 343.1895356177.

Adding to 40420540 its reverse (4502404), we get a palindrome (44922944).

The spelling of 40420540 in words is "forty million, four hundred twenty thousand, five hundred forty".