40378147 has 4 divisors (see below), whose sum is σ = 40673016. Its totient is φ = 40083280.

The previous prime is 40378139. The next prime is 40378159. The reversal of 40378147 is 74187304.

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 40378147 - 2³ = 40378139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40378447) 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, 147229 + ... + 147502.

It is an arithmetic number, because the mean of its divisors is an integer number (10168254).

Almost surely, 2^40378147 is an apocalyptic number.

40378147 is a deficient number, since it is larger than the sum of its proper divisors (294869).

40378147 is a wasteful number, since it uses less digits than its factorization.

40378147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294868.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 40378147 is about 6354.3801428621. The cubic root of 40378147 is about 343.0695147635.

The spelling of 40378147 in words is "forty million, three hundred seventy-eight thousand, one hundred forty-seven".