40378505 has 16 divisors (see below), whose sum is σ = 50064960. Its totient is φ = 31243968.

The previous prime is 40378489. The next prime is 40378511. The reversal of 40378505 is 50587304.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 40378505 - 2⁴ = 40378489 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22574 + ... + 24296.

It is an arithmetic number, because the mean of its divisors is an integer number (3129060).

Almost surely, 2^40378505 is an apocalyptic number.

It is an amenable number.

40378505 is a deficient number, since it is larger than the sum of its proper divisors (9686455).

40378505 is a wasteful number, since it uses less digits than its factorization.

40378505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1880.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 40378505 is about 6354.4083123451. The cubic root of 40378505 is about 343.0705286661.

The spelling of 40378505 in words is "forty million, three hundred seventy-eight thousand, five hundred five".