42954640 has 20 divisors (see below), whose sum is σ = 99869724. Its totient is φ = 17181824.

The previous prime is 42954629. The next prime is 42954641. The reversal of 42954640 is 4645924.

It can be written as a sum of positive squares in 2 ways, for example, as 22014864 + 20939776 = 4692^2 + 4576^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 42954596 and 42954605.

It is not an unprimeable number, because it can be changed into a prime (42954641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268387 + ... + 268546.

Almost surely, 2^42954640 is an apocalyptic number.

42954640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42954640 is an abundant number, since it is smaller than the sum of its proper divisors (56915084).

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

42954640 is a wasteful number, since it uses less digits than its factorization.

42954640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536946 (or 536940 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 42954640 is about 6553.9789441224. The cubic root of 42954640 is about 350.2165734438.

The spelling of 42954640 in words is "forty-two million, nine hundred fifty-four thousand, six hundred forty".