57921448 has 48 divisors (see below), whose sum is σ = 124524540. Its totient is φ = 25021440.

The previous prime is 57921407. The next prime is 57921463. The reversal of 57921448 is 84412975.

It can be written as a sum of positive squares in 6 ways, for example, as 191844 + 57729604 = 438^2 + 7598^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 57921448.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 319918 + ... + 320098.

Almost surely, 2^57921448 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 57921448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62262270).

57921448 is an abundant number, since it is smaller than the sum of its proper divisors (66603092).

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

57921448 is a wasteful number, since it uses less digits than its factorization.

57921448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398 (or 213 counting only the distinct ones).

The product of its digits is 80640, while the sum is 40.

The square root of 57921448 is about 7610.6141670696. The cubic root of 57921448 is about 386.9128350542.

It can be divided in two parts, 5792 and 1448, that multiplied together give a square (8386816 = 2896²).

The spelling of 57921448 in words is "fifty-seven million, nine hundred twenty-one thousand, four hundred forty-eight".