40234540 has 24 divisors (see below), whose sum is σ = 86777712. Its totient is φ = 15658560.

The previous prime is 40234511. The next prime is 40234543. The reversal of 40234540 is 4543204.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (40234543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26446 + ... + 27925.

It is an arithmetic number, because the mean of its divisors is an integer number (3615738).

Almost surely, 2^40234540 is an apocalyptic number.

It is an amenable number.

40234540 is an abundant number, since it is smaller than the sum of its proper divisors (46543172).

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

40234540 is a wasteful number, since it uses less digits than its factorization.

40234540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54417 (or 54415 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 40234540 is about 6343.0702345158. The cubic root of 40234540 is about 342.6623167264.

Adding to 40234540 its reverse (4543204), we get a palindrome (44777744).

The spelling of 40234540 in words is "forty million, two hundred thirty-four thousand, five hundred forty".