77061072 has 40 divisors (see below), whose sum is σ = 217173600. Its totient is φ = 23351680.

The previous prime is 77061067. The next prime is 77061077. The reversal of 77061072 is 27016077.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (77061067) and next prime (77061077).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77061077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72447 + ... + 73502.

It is an arithmetic number, because the mean of its divisors is an integer number (5429340).

Almost surely, 2^77061072 is an apocalyptic number.

It is an amenable number.

77061072 is an abundant number, since it is smaller than the sum of its proper divisors (140112528).

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

77061072 is a wasteful number, since it uses less digits than its factorization.

77061072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145971 (or 145965 counting only the distinct ones).

The product of its (nonzero) digits is 4116, while the sum is 30.

The square root of 77061072 is about 8778.4435978139. The cubic root of 77061072 is about 425.5445329283.

It can be divided in two parts, 7706 and 1072, that added together give a palindrome (8778).

The spelling of 77061072 in words is "seventy-seven million, sixty-one thousand, seventy-two".