57778380 has 192 divisors, whose sum is σ = 200309760. Its totient is φ = 13708800.

The previous prime is 57778361. The next prime is 57778397. The reversal of 57778380 is 8387775.

57778380 is a `hidden beast` number, since 577 + 78 + 3 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 421672 + ... + 421808.

It is an arithmetic number, because the mean of its divisors is an integer number (1043280).

Almost surely, 2^57778380 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 57778380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100154880).

57778380 is an abundant number, since it is smaller than the sum of its proper divisors (142531380).

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

57778380 is a wasteful number, since it uses less digits than its factorization.

57778380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237 (or 229 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 45.

The square root of 57778380 is about 7601.2091143449. The cubic root of 57778380 is about 386.5940096670.

The spelling of 57778380 in words is "fifty-seven million, seven hundred seventy-eight thousand, three hundred eighty".