77397738 has 32 divisors (see below), whose sum is σ = 169179840. Its totient is φ = 23410560.

The previous prime is 77397689. The next prime is 77397743. The reversal of 77397738 is 83779377.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 70006 + ... + 71102.

It is an arithmetic number, because the mean of its divisors is an integer number (5286870).

Almost surely, 2^77397738 is an apocalyptic number.

77397738 is an abundant number, since it is smaller than the sum of its proper divisors (91782102).

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

77397738 is a wasteful number, since it uses less digits than its factorization.

77397738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2182.

The product of its digits is 1555848, while the sum is 51.

The square root of 77397738 is about 8797.5984222968. The cubic root of 77397738 is about 426.1633418889.

The spelling of 77397738 in words is "seventy-seven million, three hundred ninety-seven thousand, seven hundred thirty-eight".