978214420 has 24 divisors (see below), whose sum is σ = 2061678024. Its totient is φ = 389870976.

The previous prime is 978214417. The next prime is 978214427. The reversal of 978214420 is 24412879.

978214420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 172449424 + 805764996 = 13132^2 + 28386^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 978214420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978214427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82747 + ... + 93826.

It is an arithmetic number, because the mean of its divisors is an integer number (85903251).

Almost surely, 2^978214420 is an apocalyptic number.

It is an amenable number.

978214420 is an abundant number, since it is smaller than the sum of its proper divisors (1083463604).

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

978214420 is a wasteful number, since it uses less digits than its factorization.

978214420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176859 (or 176857 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 978214420 is about 31276.4195521163. The cubic root of 978214420 is about 992.6847577166.

The spelling of 978214420 in words is "nine hundred seventy-eight million, two hundred fourteen thousand, four hundred twenty".