77307772 has 24 divisors (see below), whose sum is σ = 144214560. Its totient is φ = 36134400.

The previous prime is 77307767. The next prime is 77307779. The reversal of 77307772 is 27770377.

It is a super-2 number, since 2×77307772² = 11952983223207968, which contains 22 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77307779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6504 + ... + 14032.

It is an arithmetic number, because the mean of its divisors is an integer number (6008940).

Almost surely, 2^77307772 is an apocalyptic number.

It is an amenable number.

77307772 is a deficient number, since it is larger than the sum of its proper divisors (66906788).

77307772 is a wasteful number, since it uses less digits than its factorization.

77307772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7701 (or 7699 counting only the distinct ones).

The product of its (nonzero) digits is 100842, while the sum is 40.

The square root of 77307772 is about 8792.4838356405. The cubic root of 77307772 is about 425.9981558547.

The spelling of 77307772 in words is "seventy-seven million, three hundred seven thousand, seven hundred seventy-two".