77629144 has 8 divisors (see below), whose sum is σ = 145554660. Its totient is φ = 38814568.

The previous prime is 77629141. The next prime is 77629151. The reversal of 77629144 is 44192677.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 77629097 and 77629106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77629141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4851814 + ... + 4851829.

Almost surely, 2^77629144 is an apocalyptic number.

It is an amenable number.

77629144 is a deficient number, since it is larger than the sum of its proper divisors (67925516).

77629144 is a wasteful number, since it uses less digits than its factorization.

77629144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9703649 (or 9703645 counting only the distinct ones).

The product of its digits is 84672, while the sum is 40.

The square root of 77629144 is about 8810.7402640187. The cubic root of 77629144 is about 426.5876378151.

The spelling of 77629144 in words is "seventy-seven million, six hundred twenty-nine thousand, one hundred forty-four".