77948144 has 20 divisors (see below), whose sum is σ = 152181480. Its totient is φ = 38675520.

The previous prime is 77948119. The next prime is 77948161. The reversal of 77948144 is 44184977.

It is a junction number, because it is equal to n+sod(n) for n = 77948095 and 77948104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16499 + ... + 20690.

It is an arithmetic number, because the mean of its divisors is an integer number (7609074).

Almost surely, 2^77948144 is an apocalyptic number.

It is an amenable number.

77948144 is a deficient number, since it is larger than the sum of its proper divisors (74233336).

77948144 is a wasteful number, since it uses less digits than its factorization.

77948144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37328 (or 37322 counting only the distinct ones).

The product of its digits is 225792, while the sum is 44.

The square root of 77948144 is about 8828.8246103318. The cubic root of 77948144 is about 427.1711621413.

The spelling of 77948144 in words is "seventy-seven million, nine hundred forty-eight thousand, one hundred forty-four".