40056420 has 96 divisors (see below), whose sum is σ = 119968128. Its totient is φ = 9951232.

The previous prime is 40056383. The next prime is 40056421. The reversal of 40056420 is 2465004.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (40056421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 176347 + ... + 176573.

It is an arithmetic number, because the mean of its divisors is an integer number (1249668).

Almost surely, 2^40056420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40056420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59984064).

40056420 is an abundant number, since it is smaller than the sum of its proper divisors (79911708).

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

40056420 is a wasteful number, since it uses less digits than its factorization.

40056420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429 (or 427 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 40056420 is about 6329.0141412387. The cubic root of 40056420 is about 342.1559085324.

The spelling of 40056420 in words is "forty million, fifty-six thousand, four hundred twenty".