40120387 has 8 divisors (see below), whose sum is σ = 40803840. Its totient is φ = 39441480.

The previous prime is 40120373. The next prime is 40120397. The reversal of 40120387 is 78302104.

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

It is a cyclic number.

It is not a de Polignac number, because 40120387 - 2⁷ = 40120259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40120397) 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, 19812 + ... + 21742.

It is an arithmetic number, because the mean of its divisors is an integer number (5100480).

Almost surely, 2^40120387 is an apocalyptic number.

40120387 is a deficient number, since it is larger than the sum of its proper divisors (683453).

40120387 is a wasteful number, since it uses less digits than its factorization.

40120387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2273.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 40120387 is about 6334.0655980184. The cubic root of 40120387 is about 342.3379438289.

The spelling of 40120387 in words is "forty million, one hundred twenty thousand, three hundred eighty-seven".