40420200420 has 60 divisors (see below), whose sum is σ = 126799670844. Its totient is φ = 10778719680.

The previous prime is 40420200407. The next prime is 40420200473. The reversal of 40420200420 is 2400202404.

40420200420 is a `hidden beast` number, since 4 + 0 + 42 + 0 + 200 + 420 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9322288704 + 31097911716 = 96552^2 + 176346^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 40420200393 and 40420200402.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12473751 + ... + 12476990.

Almost surely, 2^40420200420 is an apocalyptic number.

It is an amenable number.

40420200420 is an abundant number, since it is smaller than the sum of its proper divisors (86379470424).

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

40420200420 is a wasteful number, since it uses less digits than its factorization.

40420200420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24950762 (or 24950751 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

Adding to 40420200420 its reverse (2400202404), we get a palindrome (42820402824).

The spelling of 40420200420 in words is "forty billion, four hundred twenty million, two hundred thousand, four hundred twenty".