77738072 has 8 divisors (see below), whose sum is σ = 145758900. Its totient is φ = 38869032.

The previous prime is 77738053. The next prime is 77738077. The reversal of 77738072 is 27083777.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77738077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4858622 + ... + 4858637.

Almost surely, 2^77738072 is an apocalyptic number.

It is an amenable number.

77738072 is a deficient number, since it is larger than the sum of its proper divisors (68020828).

77738072 is a wasteful number, since it uses less digits than its factorization.

77738072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9717265 (or 9717261 counting only the distinct ones).

The product of its (nonzero) digits is 115248, while the sum is 41.

The square root of 77738072 is about 8816.9196435036. The cubic root of 77738072 is about 426.7870715959.

The spelling of 77738072 in words is "seventy-seven million, seven hundred thirty-eight thousand, seventy-two".