42240740 has 48 divisors (see below), whose sum is σ = 91010304. Its totient is φ = 16464000.

The previous prime is 42240727. The next prime is 42240761. The reversal of 42240740 is 4704224.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214322 + ... + 214518.

It is an arithmetic number, because the mean of its divisors is an integer number (1896048).

Almost surely, 2^42240740 is an apocalyptic number.

It is an amenable number.

42240740 is an abundant number, since it is smaller than the sum of its proper divisors (48769564).

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

42240740 is a wasteful number, since it uses less digits than its factorization.

42240740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428 (or 426 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 23.

The square root of 42240740 is about 6499.2876532740. The cubic root of 42240740 is about 348.2655413708.

Adding to 42240740 its reverse (4704224), we get a palindrome (46944964).

The spelling of 42240740 in words is "forty-two million, two hundred forty thousand, seven hundred forty".