7278650280 has 320 divisors, whose sum is σ = 26812399680. Its totient is φ = 1756339200.

The previous prime is 7278650273. The next prime is 7278650287. The reversal of 7278650280 is 820568727.

7278650280 is a `hidden beast` number, since 72 + 78 + 6 + 502 + 8 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (7278650273) and next prime (7278650287).

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

It is not an unprimeable number, because it can be changed into a prime (7278650287) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 11796532 + ... + 11797148.

It is an arithmetic number, because the mean of its divisors is an integer number (83788749).

Almost surely, 2^7278650280 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 7278650280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13406199840).

7278650280 is an abundant number, since it is smaller than the sum of its proper divisors (19533749400).

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

7278650280 is a wasteful number, since it uses less digits than its factorization.

7278650280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982 (or 969 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 7278650280 is about 85315.0061829688. The cubic root of 7278650280 is about 1937.9844337332.

The spelling of 7278650280 in words is "seven billion, two hundred seventy-eight million, six hundred fifty thousand, two hundred eighty".