40780065 has 8 divisors (see below), whose sum is σ = 65248128. Its totient is φ = 21749360.

The previous prime is 40780049. The next prime is 40780073. The reversal of 40780065 is 56008704.

It is a happy number.

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

It is not a de Polignac number, because 40780065 - 2⁴ = 40780049 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1359321 + ... + 1359350.

It is an arithmetic number, because the mean of its divisors is an integer number (8156016).

Almost surely, 2^40780065 is an apocalyptic number.

It is an amenable number.

40780065 is a deficient number, since it is larger than the sum of its proper divisors (24468063).

40780065 is a wasteful number, since it uses less digits than its factorization.

40780065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2718679.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 40780065 is about 6385.9271057537. The cubic root of 40780065 is about 344.2040461746.

Adding to 40780065 its reverse (56008704), we get a palindrome (96788769).

The spelling of 40780065 in words is "forty million, seven hundred eighty thousand, sixty-five".