40628789 has 4 divisors (see below), whose sum is σ = 40679820. Its totient is φ = 40577760.

The previous prime is 40628771. The next prime is 40628813. The reversal of 40628789 is 98782604.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21003889 + 19624900 = 4583^2 + 4430^2 .

It is a cyclic number.

It is not a de Polignac number, because 40628789 - 2²⁰ = 39580213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40622789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24302 + ... + 25919.

It is an arithmetic number, because the mean of its divisors is an integer number (10169955).

Almost surely, 2^40628789 is an apocalyptic number.

It is an amenable number.

40628789 is a deficient number, since it is larger than the sum of its proper divisors (51031).

40628789 is an equidigital number, since it uses as much as digits as its factorization.

40628789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51030.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 40628789 is about 6374.0716186751. The cubic root of 40628789 is about 343.7779038946. Note that the first 3 decimals are identical.

The spelling of 40628789 in words is "forty million, six hundred twenty-eight thousand, seven hundred eighty-nine".