40436420 has 24 divisors (see below), whose sum is σ = 85131648. Its totient is φ = 16133600.

The previous prime is 40436401. The next prime is 40436423. The reversal of 40436420 is 2463404.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (40436423) 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, 6275 + ... + 10965.

It is an arithmetic number, because the mean of its divisors is an integer number (3547152).

Almost surely, 2^40436420 is an apocalyptic number.

It is an amenable number.

40436420 is an abundant number, since it is smaller than the sum of its proper divisors (44695228).

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

40436420 is a wasteful number, since it uses less digits than its factorization.

40436420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5131 (or 5129 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 40436420 is about 6358.9637520590. The cubic root of 40436420 is about 343.2344726413.

Adding to 40436420 its reverse (2463404), we get a palindrome (42899824).

The spelling of 40436420 in words is "forty million, four hundred thirty-six thousand, four hundred twenty".