40260042 has 24 divisors (see below), whose sum is σ = 87502116. Its totient is φ = 13378176.

The previous prime is 40260037. The next prime is 40260047. The reversal of 40260042 is 24006204.

It is an interprime number because it is at equal distance from previous prime (40260037) and next prime (40260047).

It can be written as a sum of positive squares in 2 ways, for example, as 32592681 + 7667361 = 5709^2 + 2769^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 40259997 and 40260024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40260047) 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, 2748 + ... + 9384.

Almost surely, 2^40260042 is an apocalyptic number.

40260042 is an abundant number, since it is smaller than the sum of its proper divisors (47242074).

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

40260042 is a wasteful number, since it uses less digits than its factorization.

40260042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6982 (or 6979 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 40260042 is about 6345.0801413379. The cubic root of 40260042 is about 342.7346983897.

Adding to 40260042 its reverse (24006204), we get a palindrome (64266246).

The spelling of 40260042 in words is "forty million, two hundred sixty thousand, forty-two".