40106420 has 24 divisors (see below), whose sum is σ = 87129000. Its totient is φ = 15489152.

The previous prime is 40106399. The next prime is 40106447. The reversal of 40106420 is 2460104.

It can be written as a sum of positive squares in 4 ways, for example, as 2676496 + 37429924 = 1636^2 + 6118^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33995 + ... + 35154.

It is an arithmetic number, because the mean of its divisors is an integer number (3630375).

Almost surely, 2^40106420 is an apocalyptic number.

It is an amenable number.

40106420 is an abundant number, since it is smaller than the sum of its proper divisors (47022580).

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

40106420 is a wasteful number, since it uses less digits than its factorization.

40106420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69187 (or 69185 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 40106420 is about 6332.9629716271. The cubic root of 40106420 is about 342.2982134958.

Adding to 40106420 its reverse (2460104), we get a palindrome (42566524).

The spelling of 40106420 in words is "forty million, one hundred six thousand, four hundred twenty".