40378401 has 72 divisors (see below), whose sum is σ = 73507200. Its totient is φ = 21228480.

The previous prime is 40378397. The next prime is 40378423. The reversal of 40378401 is 10487304.

It is not a de Polignac number, because 40378401 - 2² = 40378397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40378001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 511080 + ... + 511158.

Almost surely, 2^40378401 is an apocalyptic number.

It is an amenable number.

40378401 is a deficient number, since it is larger than the sum of its proper divisors (33128799).

40378401 is a wasteful number, since it uses less digits than its factorization.

40378401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179 (or 169 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 40378401 is about 6354.4001290444. The cubic root of 40378401 is about 343.0702341251.

The spelling of 40378401 in words is "forty million, three hundred seventy-eight thousand, four hundred one".