978469632 has 378 divisors, whose sum is σ = 3438267588. Its totient is φ = 276950016.

The previous prime is 978469631. The next prime is 978469637. The reversal of 978469632 is 236964879.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (378).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (978469631) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 9144523 + ... + 9144629.

It is an arithmetic number, because the mean of its divisors is an integer number (9095946).

Almost surely, 2^978469632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 978469632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1719133794).

978469632 is an abundant number, since it is smaller than the sum of its proper divisors (2459797956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

978469632 is an equidigital number, since it uses as much as digits as its factorization.

978469632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 119 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The square root of 978469632 is about 31280.4992287527. The cubic root of 978469632 is about 992.7710792934.

The spelling of 978469632 in words is "nine hundred seventy-eight million, four hundred sixty-nine thousand, six hundred thirty-two".