77111420 has 12 divisors (see below), whose sum is σ = 161934024. Its totient is φ = 30844560.

The previous prime is 77111417. The next prime is 77111429. The reversal of 77111420 is 2411177.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77111429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1927766 + ... + 1927805.

It is an arithmetic number, because the mean of its divisors is an integer number (13494502).

Almost surely, 2^77111420 is an apocalyptic number.

It is an amenable number.

77111420 is an abundant number, since it is smaller than the sum of its proper divisors (84822604).

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

77111420 is a wasteful number, since it uses less digits than its factorization.

77111420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3855580 (or 3855578 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 23.

The square root of 77111420 is about 8781.3108360882. The cubic root of 77111420 is about 425.6371895325.

Adding to 77111420 its reverse (2411177), we get a palindrome (79522597).

The spelling of 77111420 in words is "seventy-seven million, one hundred eleven thousand, four hundred twenty".