42516440 has 16 divisors (see below), whose sum is σ = 95662080. Its totient is φ = 17006560.

The previous prime is 42516437. The next prime is 42516449. The reversal of 42516440 is 4461524.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42516449) 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, 531416 + ... + 531495.

It is an arithmetic number, because the mean of its divisors is an integer number (5978880).

Almost surely, 2^42516440 is an apocalyptic number.

42516440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42516440 is an abundant number, since it is smaller than the sum of its proper divisors (53145640).

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

42516440 is a wasteful number, since it uses less digits than its factorization.

42516440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062922 (or 1062918 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 42516440 is about 6520.4631737324. The cubic root of 42516440 is about 349.0215939983.

Adding to 42516440 its reverse (4461524), we get a palindrome (46977964).

The spelling of 42516440 in words is "forty-two million, five hundred sixteen thousand, four hundred forty".