77620846 has 4 divisors (see below), whose sum is σ = 116431272. Its totient is φ = 38810422.

The previous prime is 77620843. The next prime is 77620859. The reversal of 77620846 is 64802677.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64802677 = 43 ⋅1507039.

It is a junction number, because it is equal to n+sod(n) for n = 77620799 and 77620808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77620841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19405210 + ... + 19405213.

It is an arithmetic number, because the mean of its divisors is an integer number (29107818).

Almost surely, 2^77620846 is an apocalyptic number.

77620846 is a deficient number, since it is larger than the sum of its proper divisors (38810426).

77620846 is a wasteful number, since it uses less digits than its factorization.

77620846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38810425.

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 77620846 is about 8810.2693488905. The cubic root of 77620846 is about 426.5724375515.

The spelling of 77620846 in words is "seventy-seven million, six hundred twenty thousand, eight hundred forty-six".