40100420 has 12 divisors (see below), whose sum is σ = 84210924. Its totient is φ = 16040160.

The previous prime is 40100387. The next prime is 40100441. The reversal of 40100420 is 2400104.

It can be written as a sum of positive squares in 2 ways, for example, as 30316036 + 9784384 = 5506^2 + 3128^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1002491 + ... + 1002530.

It is an arithmetic number, because the mean of its divisors is an integer number (7017577).

Almost surely, 2^40100420 is an apocalyptic number.

It is an amenable number.

40100420 is an abundant number, since it is smaller than the sum of its proper divisors (44110504).

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

40100420 is a wasteful number, since it uses less digits than its factorization.

40100420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2005030 (or 2005028 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 40100420 is about 6332.4892419964. The cubic root of 40100420 is about 342.2811431473.

Adding to 40100420 its reverse (2400104), we get a palindrome (42500524).

The spelling of 40100420 in words is "forty million, one hundred thousand, four hundred twenty".