381257578 has 12 divisors (see below), whose sum is σ = 619262118. Its totient is φ = 175964880.

The previous prime is 381257557. The next prime is 381257599. The reversal of 381257578 is 875752183.

It is an interprime number because it is at equal distance from previous prime (381257557) and next prime (381257599).

It can be written as a sum of positive squares in 3 ways, for example, as 246395809 + 134861769 = 15697^2 + 11613^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 563653 + ... + 564328.

Almost surely, 2^381257578 is an apocalyptic number.

381257578 is a deficient number, since it is larger than the sum of its proper divisors (238004540).

381257578 is a wasteful number, since it uses less digits than its factorization.

381257578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128009 (or 1127996 counting only the distinct ones).

The product of its digits is 470400, while the sum is 46.

The square root of 381257578 is about 19525.8182414976. The cubic root of 381257578 is about 725.1137850741.

The spelling of 381257578 in words is "three hundred eighty-one million, two hundred fifty-seven thousand, five hundred seventy-eight".