77306250 has 192 divisors, whose sum is σ = 239984640. Its totient is φ = 16200000.

The previous prime is 77306249. The next prime is 77306263. The reversal of 77306250 is 5260377.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2493735 + ... + 2493765.

It is an arithmetic number, because the mean of its divisors is an integer number (1249920).

Almost surely, 2^77306250 is an apocalyptic number.

77306250 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 77306250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119992320).

77306250 is an abundant number, since it is smaller than the sum of its proper divisors (162678390).

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

77306250 is a wasteful number, since it uses less digits than its factorization.

77306250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 30.

The square root of 77306250 is about 8792.3972840176. The cubic root of 77306250 is about 425.9953602175.

The spelling of 77306250 in words is "seventy-seven million, three hundred six thousand, two hundred fifty".