40720134 has 128 divisors (see below), whose sum is σ = 109734912. Its totient is φ = 9768960.

The previous prime is 40720129. The next prime is 40720153. The reversal of 40720134 is 43102704.

40720134 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 40720134.

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 63 ways as a sum of consecutive naturals, for example, 380509 + ... + 380615.

It is an arithmetic number, because the mean of its divisors is an integer number (857304).

Almost surely, 2^40720134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40720134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54867456).

40720134 is an abundant number, since it is smaller than the sum of its proper divisors (69014778).

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

40720134 is a wasteful number, since it uses less digits than its factorization.

40720134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 40720134 is about 6381.2329529645. The cubic root of 40720134 is about 344.0353476838.

Adding to 40720134 its reverse (43102704), we get a palindrome (83822838).

The spelling of 40720134 in words is "forty million, seven hundred twenty thousand, one hundred thirty-four".