42908540 has 24 divisors (see below), whose sum is σ = 90275472. Its totient is φ = 17131520.

The previous prime is 42908521. The next prime is 42908549. The reversal of 42908540 is 4580924.

It is a super-2 number, since 2×42908540² = 3682285609863200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42908497 and 42908506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42908549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11147 + ... + 14493.

It is an arithmetic number, because the mean of its divisors is an integer number (3761478).

Almost surely, 2^42908540 is an apocalyptic number.

It is an amenable number.

42908540 is an abundant number, since it is smaller than the sum of its proper divisors (47366932).

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

42908540 is a wasteful number, since it uses less digits than its factorization.

42908540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3997 (or 3995 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 42908540 is about 6550.4610524756. The cubic root of 42908540 is about 350.0912415183.

The spelling of 42908540 in words is "forty-two million, nine hundred eight thousand, five hundred forty".