7278136320 has 704 divisors, whose sum is σ = 29580558336. Its totient is φ = 1486356480.

The previous prime is 7278136277. The next prime is 7278136387. The reversal of 7278136320 is 236318727.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 57308097 + ... + 57308223.

Almost surely, 2^7278136320 is an apocalyptic number.

7278136320 is a gapful number since it is divisible by the number (70) 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 7278136320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14790279168).

7278136320 is an abundant number, since it is smaller than the sum of its proper divisors (22302422016).

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

7278136320 is a wasteful number, since it uses less digits than its factorization.

7278136320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 198 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 7278136320 is about 85311.9939984994. The cubic root of 7278136320 is about 1937.9388176787.

The spelling of 7278136320 in words is "seven billion, two hundred seventy-eight million, one hundred thirty-six thousand, three hundred twenty".