42546440 has 16 divisors (see below), whose sum is σ = 95729580. Its totient is φ = 17018560.

The previous prime is 42546419. The next prime is 42546443. The reversal of 42546440 is 4464524.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 42432196 + 114244 = 6514^2 + 338^2 .

It is not an unprimeable number, because it can be changed into a prime (42546443) 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, 531791 + ... + 531870.

Almost surely, 2^42546440 is an apocalyptic number.

42546440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42546440 is an abundant number, since it is smaller than the sum of its proper divisors (53183140).

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

42546440 is a wasteful number, since it uses less digits than its factorization.

42546440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063672 (or 1063668 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 29.

The square root of 42546440 is about 6522.7632181461. The cubic root of 42546440 is about 349.1036656711.

The spelling of 42546440 in words is "forty-two million, five hundred forty-six thousand, four hundred forty".