981478646 has 8 divisors (see below), whose sum is σ = 1558819080. Its totient is φ = 461872288.

The previous prime is 981478643. The next prime is 981478661. The reversal of 981478646 is 646874189.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981478643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14433476 + ... + 14433543.

It is an arithmetic number, because the mean of its divisors is an integer number (194852385).

Almost surely, 2^981478646 is an apocalyptic number.

981478646 is a deficient number, since it is larger than the sum of its proper divisors (577340434).

981478646 is a wasteful number, since it uses less digits than its factorization.

981478646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28867038.

The product of its digits is 2322432, while the sum is 53.

The square root of 981478646 is about 31328.5595902525. The cubic root of 981478646 is about 993.7877026108.

The spelling of 981478646 in words is "nine hundred eighty-one million, four hundred seventy-eight thousand, six hundred forty-six".