42908640 has 48 divisors (see below), whose sum is σ = 135163728. Its totient is φ = 11442176.

The previous prime is 42908633. The next prime is 42908647. The reversal of 42908640 is 4680924.

It is an interprime number because it is at equal distance from previous prime (42908633) and next prime (42908647).

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42908647) 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, 44217 + ... + 45176.

It is an arithmetic number, because the mean of its divisors is an integer number (2815911).

Almost surely, 2^42908640 is an apocalyptic number.

42908640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42908640 is an abundant number, since it is smaller than the sum of its proper divisors (92255088).

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

42908640 is a wasteful number, since it uses less digits than its factorization.

42908640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89411 (or 89403 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 42908640 is about 6550.4686855217. The cubic root of 42908640 is about 350.0915134851.

The spelling of 42908640 in words is "forty-two million, nine hundred eight thousand, six hundred forty".