77191002 has 64 divisors (see below), whose sum is σ = 199791360. Its totient is φ = 21632832.

The previous prime is 77190989. The next prime is 77191027. The reversal of 77191002 is 20019177.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18108 + ... + 21960.

It is an arithmetic number, because the mean of its divisors is an integer number (3121740).

Almost surely, 2^77191002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77191002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99895680).

77191002 is an abundant number, since it is smaller than the sum of its proper divisors (122600358).

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

77191002 is a wasteful number, since it uses less digits than its factorization.

77191002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3924 (or 3918 counting only the distinct ones).

The product of its (nonzero) digits is 882, while the sum is 27.

The square root of 77191002 is about 8785.8409956020. The cubic root of 77191002 is about 425.7835639291.

The spelling of 77191002 in words is "seventy-seven million, one hundred ninety-one thousand, two".