77620850 has 12 divisors (see below), whose sum is σ = 144374874. Its totient is φ = 31048320.

The previous prime is 77620843. The next prime is 77620859. The reversal of 77620850 is 5802677.

It can be written as a sum of positive squares in 3 ways, for example, as 52027369 + 25593481 = 7213^2 + 5059^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 77620850.

It is not an unprimeable number, because it can be changed into a prime (77620859) 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 5 ways as a sum of consecutive naturals, for example, 776159 + ... + 776258.

Almost surely, 2^77620850 is an apocalyptic number.

77620850 is a deficient number, since it is larger than the sum of its proper divisors (66754024).

77620850 is a wasteful number, since it uses less digits than its factorization.

77620850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552429 (or 1552424 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 77620850 is about 8810.2695758983. The cubic root of 77620850 is about 426.5724448790.

The spelling of 77620850 in words is "seventy-seven million, six hundred twenty thousand, eight hundred fifty".