42518740 has 48 divisors (see below), whose sum is σ = 98106624. Its totient is φ = 15350400.

The previous prime is 42518737. The next prime is 42518747. The reversal of 42518740 is 4781524.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42518747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33925 + ... + 35155.

It is an arithmetic number, because the mean of its divisors is an integer number (2043888).

Almost surely, 2^42518740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42518740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49053312).

42518740 is an abundant number, since it is smaller than the sum of its proper divisors (55587884).

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

42518740 is a wasteful number, since it uses less digits than its factorization.

42518740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408 (or 1406 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 42518740 is about 6520.6395391863. The cubic root of 42518740 is about 349.0278875261.

The spelling of 42518740 in words is "forty-two million, five hundred eighteen thousand, seven hundred forty".