77951382 has 16 divisors (see below), whose sum is σ = 156107952. Its totient is φ = 25949600.

The previous prime is 77951381. The next prime is 77951383. The reversal of 77951382 is 28315977.

It is an interprime number because it is at equal distance from previous prime (77951381) and next prime (77951383).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77951381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3369 + ... + 12932.

It is an arithmetic number, because the mean of its divisors is an integer number (9756747).

Almost surely, 2^77951382 is an apocalyptic number.

77951382 is an abundant number, since it is smaller than the sum of its proper divisors (78156570).

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

77951382 is a wasteful number, since it uses less digits than its factorization.

77951382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17103.

The product of its digits is 105840, while the sum is 42.

The square root of 77951382 is about 8829.0079850457. The cubic root of 77951382 is about 427.1770770184.

The spelling of 77951382 in words is "seventy-seven million, nine hundred fifty-one thousand, three hundred eighty-two".