78282750 has 256 divisors, whose sum is σ = 254951424. Its totient is φ = 15552000.

The previous prime is 78282727. The next prime is 78282751. The reversal of 78282750 is 5728287.

It is a super-2 number, since 2×78282750² = 12256377895125000, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 78282699 and 78282708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78282751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2115732 + ... + 2115768.

It is an arithmetic number, because the mean of its divisors is an integer number (995904).

Almost surely, 2^78282750 is an apocalyptic number.

78282750 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 78282750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127475712).

78282750 is an abundant number, since it is smaller than the sum of its proper divisors (176668674).

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

78282750 is a wasteful number, since it uses less digits than its factorization.

78282750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 39.

The square root of 78282750 is about 8847.7539522751. The cubic root of 78282750 is about 427.7815251760.

The spelling of 78282750 in words is "seventy-eight million, two hundred eighty-two thousand, seven hundred fifty".