77274648 has 160 divisors (see below), whose sum is σ = 243326160. Its totient is φ = 22705920.

The previous prime is 77274643. The next prime is 77274649. The reversal of 77274648 is 84647277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77274643) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 263590 + ... + 263882.

Almost surely, 2^77274648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77274648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121663080).

77274648 is an abundant number, since it is smaller than the sum of its proper divisors (166051512).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77274648 is a wasteful number, since it uses less digits than its factorization.

77274648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359 (or 346 counting only the distinct ones).

The product of its digits is 526848, while the sum is 45.

The square root of 77274648 is about 8790.5999795236. The cubic root of 77274648 is about 425.9373047985.

The spelling of 77274648 in words is "seventy-seven million, two hundred seventy-four thousand, six hundred forty-eight".