77954644 has 24 divisors (see below), whose sum is σ = 144668160. Its totient is φ = 36651456.

The previous prime is 77954629. The next prime is 77954647. The reversal of 77954644 is 44645977.

It is a junction number, because it is equal to n+sod(n) for n = 77954594 and 77954603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77954647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6669 + ... + 14155.

It is an arithmetic number, because the mean of its divisors is an integer number (6027840).

Almost surely, 2^77954644 is an apocalyptic number.

It is an amenable number.

77954644 is a deficient number, since it is larger than the sum of its proper divisors (66713516).

77954644 is a wasteful number, since it uses less digits than its factorization.

77954644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7647 (or 7645 counting only the distinct ones).

The product of its digits is 846720, while the sum is 46.

The square root of 77954644 is about 8829.1927150788. The cubic root of 77954644 is about 427.1830355708.

The spelling of 77954644 in words is "seventy-seven million, nine hundred fifty-four thousand, six hundred forty-four".