979619840 has 104 divisors (see below), whose sum is σ = 2428205568. Its totient is φ = 378961920.

The previous prime is 979619827. The next prime is 979619843. The reversal of 979619840 is 48916979.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (979619843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 634109 + ... + 635651.

Almost surely, 2^979619840 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 979619840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1214102784).

979619840 is an abundant number, since it is smaller than the sum of its proper divisors (1448585728).

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

979619840 is a wasteful number, since it uses less digits than its factorization.

979619840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603 (or 1581 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 53.

The square root of 979619840 is about 31298.8792131603. The cubic root of 979619840 is about 993.1599334979.

The spelling of 979619840 in words is "nine hundred seventy-nine million, six hundred nineteen thousand, eight hundred forty".