77671420 has 12 divisors (see below), whose sum is σ = 163110024. Its totient is φ = 31068560.

The previous prime is 77671403. The next prime is 77671427. The reversal of 77671420 is 2417677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77671427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1941766 + ... + 1941805.

It is an arithmetic number, because the mean of its divisors is an integer number (13592502).

Almost surely, 2^77671420 is an apocalyptic number.

It is an amenable number.

77671420 is an abundant number, since it is smaller than the sum of its proper divisors (85438604).

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

77671420 is a wasteful number, since it uses less digits than its factorization.

77671420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3883580 (or 3883578 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 77671420 is about 8813.1390548431. The cubic root of 77671420 is about 426.6650621142.

The spelling of 77671420 in words is "seventy-seven million, six hundred seventy-one thousand, four hundred twenty".