77195490 has 32 divisors (see below), whose sum is σ = 185613120. Its totient is φ = 20547264.

The previous prime is 77195467. The next prime is 77195491. The reversal of 77195490 is 9459177.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (77195491) 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 15 ways as a sum of consecutive naturals, for example, 16492 + ... + 20648.

It is an arithmetic number, because the mean of its divisors is an integer number (5800410).

Almost surely, 2^77195490 is an apocalyptic number.

77195490 is an abundant number, since it is smaller than the sum of its proper divisors (108417630).

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

77195490 is a wasteful number, since it uses less digits than its factorization.

77195490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4786.

The product of its (nonzero) digits is 79380, while the sum is 42.

The square root of 77195490 is about 8786.0964028401. The cubic root of 77195490 is about 425.7918156663.

The spelling of 77195490 in words is "seventy-seven million, one hundred ninety-five thousand, four hundred ninety".