978670620 has 384 divisors, whose sum is σ = 3522355200. Its totient is φ = 223948800.

The previous prime is 978670619. The next prime is 978670621. The reversal of 978670620 is 26076879.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (978670619) and next prime (978670621).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978670621) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5406930 + ... + 5407110.

It is an arithmetic number, because the mean of its divisors is an integer number (9172800).

Almost surely, 2^978670620 is an apocalyptic number.

978670620 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 978670620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1761177600).

978670620 is an abundant number, since it is smaller than the sum of its proper divisors (2543684580).

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

978670620 is a wasteful number, since it uses less digits than its factorization.

978670620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 978670620 is about 31283.7117363014. The cubic root of 978670620 is about 992.8390498624.

The spelling of 978670620 in words is "nine hundred seventy-eight million, six hundred seventy thousand, six hundred twenty".