40781015 has 8 divisors (see below), whose sum is σ = 53386128. Its totient is φ = 29658880.

The previous prime is 40781003. The next prime is 40781021. The reversal of 40781015 is 51018704.

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

It is not a de Polignac number, because 40781015 - 2⁸ = 40780759 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 370682 + ... + 370791.

It is an arithmetic number, because the mean of its divisors is an integer number (6673266).

Almost surely, 2^40781015 is an apocalyptic number.

40781015 is a deficient number, since it is larger than the sum of its proper divisors (12605113).

40781015 is a wasteful number, since it uses less digits than its factorization.

40781015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741489.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 40781015 is about 6386.0014876290. The cubic root of 40781015 is about 344.2067189781.

Adding to 40781015 its reverse (51018704), we get a palindrome (91799719).

The spelling of 40781015 in words is "forty million, seven hundred eighty-one thousand, fifteen".