40436520 has 64 divisors (see below), whose sum is σ = 121806720. Its totient is φ = 10738944.

The previous prime is 40436483. The next prime is 40436549. The reversal of 40436520 is 2563404.

It is a super-2 number, since 2×40436520² = 3270224299420800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 37509 + ... + 38571.

It is an arithmetic number, because the mean of its divisors is an integer number (1903230).

Almost surely, 2^40436520 is an apocalyptic number.

40436520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40436520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60903360).

40436520 is an abundant number, since it is smaller than the sum of its proper divisors (81370200).

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

40436520 is a wasteful number, since it uses less digits than its factorization.

40436520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394 (or 1390 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 40436520 is about 6358.9716149705. The cubic root of 40436520 is about 343.2347555828.

Adding to 40436520 its reverse (2563404), we get a palindrome (42999924).

The spelling of 40436520 in words is "forty million, four hundred thirty-six thousand, five hundred twenty".