40378045 has 8 divisors (see below), whose sum is σ = 48763224. Its totient is φ = 32096064.

The previous prime is 40378033. The next prime is 40378049. The reversal of 40378045 is 54087304.

It can be written as a sum of positive squares in 4 ways, for example, as 10106041 + 30272004 = 3179^2 + 5502^2 .

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 40378045 - 2⁷ = 40377917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40377998 and 40378016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40378049) 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, 24934 + ... + 26503.

It is an arithmetic number, because the mean of its divisors is an integer number (6095403).

Almost surely, 2^40378045 is an apocalyptic number.

It is an amenable number.

40378045 is a deficient number, since it is larger than the sum of its proper divisors (8385179).

40378045 is a wasteful number, since it uses less digits than its factorization.

40378045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51599.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 40378045 is about 6354.3721168972. The cubic root of 40378045 is about 343.0692258851.

The spelling of 40378045 in words is "forty million, three hundred seventy-eight thousand, forty-five".