40378810 has 8 divisors (see below), whose sum is σ = 72681876. Its totient is φ = 16151520.

The previous prime is 40378801. The next prime is 40378813. The reversal of 40378810 is 1887304.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 40233649 + 145161 = 6343^2 + 381^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×40378810² = 3260896594032200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40378813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2018931 + ... + 2018950.

Almost surely, 2^40378810 is an apocalyptic number.

40378810 is a deficient number, since it is larger than the sum of its proper divisors (32303066).

40378810 is a wasteful number, since it uses less digits than its factorization.

40378810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4037888.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 40378810 is about 6354.4323113871. The cubic root of 40378810 is about 343.0713924610.

The spelling of 40378810 in words is "forty million, three hundred seventy-eight thousand, eight hundred ten".