40840030 has 48 divisors (see below), whose sum is σ = 93300336. Its totient is φ = 12727680.

The previous prime is 40840027. The next prime is 40840031. The reversal of 40840030 is 3004804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40840031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1602 + ... + 9178.

It is an arithmetic number, because the mean of its divisors is an integer number (1943757).

Almost surely, 2^40840030 is an apocalyptic number.

40840030 is an abundant number, since it is smaller than the sum of its proper divisors (52460306).

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

40840030 is a wasteful number, since it uses less digits than its factorization.

40840030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7609 (or 7602 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 40840030 is about 6390.6204706585. The cubic root of 40840030 is about 344.3726750304.

Adding to 40840030 its reverse (3004804), we get a palindrome (43844834).

The spelling of 40840030 in words is "forty million, eight hundred forty thousand, thirty".