40278001 has 4 divisors (see below), whose sum is σ = 40469104. Its totient is φ = 40086900.

The previous prime is 40277987. The next prime is 40278019. The reversal of 40278001 is 10087204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40278001 - 2¹⁷ = 40146929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40278041) 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, 95235 + ... + 95656.

It is an arithmetic number, because the mean of its divisors is an integer number (10117276).

Almost surely, 2^40278001 is an apocalyptic number.

It is an amenable number.

40278001 is a deficient number, since it is larger than the sum of its proper divisors (191103).

40278001 is a wasteful number, since it uses less digits than its factorization.

40278001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191102.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 40278001 is about 6346.4951745038. The cubic root of 40278001 is about 342.7856526126.

The spelling of 40278001 in words is "forty million, two hundred seventy-eight thousand, one".