77243136 has 72 divisors (see below), whose sum is σ = 210450240. Its totient is φ = 25138176.

The previous prime is 77243077. The next prime is 77243147. The reversal of 77243136 is 63134277.

It is a super-2 number, since 2×77243136² = 11933004118228992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 77243097 and 77243106.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31855 + ... + 34193.

It is an arithmetic number, because the mean of its divisors is an integer number (2922920).

Almost surely, 2^77243136 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 77243136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105225120).

77243136 is an abundant number, since it is smaller than the sum of its proper divisors (133207104).

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

77243136 is a wasteful number, since it uses less digits than its factorization.

77243136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2401 (or 2387 counting only the distinct ones).

The product of its digits is 21168, while the sum is 33.

The square root of 77243136 is about 8788.8074276320. The cubic root of 77243136 is about 425.8793989540.

The spelling of 77243136 in words is "seventy-seven million, two hundred forty-three thousand, one hundred thirty-six".