40090745 has 8 divisors (see below), whose sum is σ = 48550920. Its totient is φ = 31777920.

The previous prime is 40090733. The next prime is 40090747. The reversal of 40090745 is 54709004.

It can be written as a sum of positive squares in 4 ways, for example, as 1352569 + 38738176 = 1163^2 + 6224^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40090745 - 2⁶ = 40090681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40090747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36236 + ... + 37325.

It is an arithmetic number, because the mean of its divisors is an integer number (6068865).

Almost surely, 2^40090745 is an apocalyptic number.

It is an amenable number.

40090745 is a deficient number, since it is larger than the sum of its proper divisors (8460175).

40090745 is a wasteful number, since it uses less digits than its factorization.

40090745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73675.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 40090745 is about 6331.7252783108. The cubic root of 40090745 is about 342.2536136233.

Adding to 40090745 its reverse (54709004), we get a palindrome (94799749).

The spelling of 40090745 in words is "forty million, ninety thousand, seven hundred forty-five".