978266250 has 120 divisors (see below), whose sum is σ = 2852789940. Its totient is φ = 240768000.

The previous prime is 978266239. The next prime is 978266257. The reversal of 978266250 is 52662879.

It can be written as a sum of positive squares in 10 ways, for example, as 83119689 + 895146561 = 9117^2 + 29919^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 978266196 and 978266205.

It is not an unprimeable number, because it can be changed into a prime (978266257) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 142906 + ... + 149594.

Almost surely, 2^978266250 is an apocalyptic number.

978266250 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 978266250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1426394970).

978266250 is an abundant number, since it is smaller than the sum of its proper divisors (1874523690).

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

978266250 is a wasteful number, since it uses less digits than its factorization.

978266250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6730 (or 6712 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 978266250 is about 31277.2481206387. The cubic root of 978266250 is about 992.7022896405.

The spelling of 978266250 in words is "nine hundred seventy-eight million, two hundred sixty-six thousand, two hundred fifty".