40378451 has 4 divisors (see below), whose sum is σ = 42753672. Its totient is φ = 38003232.

The previous prime is 40378447. The next prime is 40378489. The reversal of 40378451 is 15487304.

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

It is a cyclic number.

It is not a de Polignac number, because 40378451 - 2² = 40378447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40378651) 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, 1187585 + ... + 1187618.

It is an arithmetic number, because the mean of its divisors is an integer number (10688418).

Almost surely, 2^40378451 is an apocalyptic number.

40378451 is a deficient number, since it is larger than the sum of its proper divisors (2375221).

40378451 is a wasteful number, since it uses less digits than its factorization.

40378451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2375220.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 40378451 is about 6354.4040633249. The cubic root of 40378451 is about 343.0703757314.

The spelling of 40378451 in words is "forty million, three hundred seventy-eight thousand, four hundred fifty-one".