981440415 has 16 divisors (see below), whose sum is σ = 1744783200. Its totient is φ = 523434816.

The previous prime is 981440401. The next prime is 981440419. The reversal of 981440415 is 514044189.

It is not a de Polignac number, because 981440415 - 2⁴ = 981440399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 981440415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981440419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3634830 + ... + 3635099.

It is an arithmetic number, because the mean of its divisors is an integer number (109048950).

Almost surely, 2^981440415 is an apocalyptic number.

981440415 is a deficient number, since it is larger than the sum of its proper divisors (763342785).

981440415 is a wasteful number, since it uses less digits than its factorization.

981440415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7269943 (or 7269937 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 981440415 is about 31327.9494222013. The cubic root of 981440415 is about 993.7747989539.

The spelling of 981440415 in words is "nine hundred eighty-one million, four hundred forty thousand, four hundred fifteen".