40451389 has 12 divisors (see below), whose sum is σ = 44715132. Its totient is φ = 36565760.

The previous prime is 40451377. The next prime is 40451393. The reversal of 40451389 is 98315404.

It can be written as a sum of positive squares in 2 ways, for example, as 39312900 + 1138489 = 6270^2 + 1067^2 .

It is a de Polignac number, because none of the positive numbers 2^k-40451389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40451309) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22989 + ... + 24685.

It is an arithmetic number, because the mean of its divisors is an integer number (3726261).

Almost surely, 2^40451389 is an apocalyptic number.

It is an amenable number.

40451389 is a deficient number, since it is larger than the sum of its proper divisors (4263743).

40451389 is a wasteful number, since it uses less digits than its factorization.

40451389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1916 (or 1905 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 40451389 is about 6360.1406430990. The cubic root of 40451389 is about 343.2768209580.

The spelling of 40451389 in words is "forty million, four hundred fifty-one thousand, three hundred eighty-nine".