42644520 has 48 divisors (see below), whose sum is σ = 138595860. Its totient is φ = 11371776.

The previous prime is 42644501. The next prime is 42644521. The reversal of 42644520 is 2544624.

It can be written as a sum of positive squares in 2 ways, for example, as 39162564 + 3481956 = 6258^2 + 1866^2 .

It is not an unprimeable number, because it can be changed into a prime (42644521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58869 + ... + 59588.

Almost surely, 2^42644520 is an apocalyptic number.

42644520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42644520 is an abundant number, since it is smaller than the sum of its proper divisors (95951340).

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

42644520 is a wasteful number, since it uses less digits than its factorization.

42644520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118474 (or 118467 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 42644520 is about 6530.2771763532. The cubic root of 42644520 is about 349.3717163828.

The spelling of 42644520 in words is "forty-two million, six hundred forty-four thousand, five hundred twenty".