40400211220 has 48 divisors (see below), whose sum is σ = 87603618816. Its totient is φ = 15634080000.

The previous prime is 40400211211. The next prime is 40400211329. The reversal of 40400211220 is 2211200404.

It is a super-2 number, since 2×40400211220² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40400211194 and 40400211203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2615520 + ... + 2630920.

It is an arithmetic number, because the mean of its divisors is an integer number (1825075392).

Almost surely, 2^40400211220 is an apocalyptic number.

It is an amenable number.

40400211220 is an abundant number, since it is smaller than the sum of its proper divisors (47203407596).

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

40400211220 is a wasteful number, since it uses less digits than its factorization.

40400211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19672 (or 19670 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 40400211220 its reverse (2211200404), we get a palindrome (42611411624).

The spelling of 40400211220 in words is "forty billion, four hundred million, two hundred eleven thousand, two hundred twenty".