77244030 has 80 divisors (see below), whose sum is σ = 212224320. Its totient is φ = 20150208.

The previous prime is 77244007. The next prime is 77244031. The reversal of 77244030 is 3044277.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 77243985 and 77244003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77244031) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 37056 + ... + 39084.

It is an arithmetic number, because the mean of its divisors is an integer number (2652804).

Almost surely, 2^77244030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77244030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106112160).

77244030 is an abundant number, since it is smaller than the sum of its proper divisors (134980290).

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

77244030 is a wasteful number, since it uses less digits than its factorization.

77244030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2095 (or 2086 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 27.

The square root of 77244030 is about 8788.8582876276. The cubic root of 77244030 is about 425.8810419682.

The spelling of 77244030 in words is "seventy-seven million, two hundred forty-four thousand, thirty".