76530381 has 16 divisors (see below), whose sum is σ = 104428800. Its totient is φ = 49840128.

The previous prime is 76530373. The next prime is 76530397. The reversal of 76530381 is 18303567.

It is a happy number.

It is not a de Polignac number, because 76530381 - 2³ = 76530373 is a prime.

It is a super-2 number, since 2×76530381² = 11713798432010322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76530301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21325 + ... + 24653.

It is an arithmetic number, because the mean of its divisors is an integer number (6526800).

Almost surely, 2^76530381 is an apocalyptic number.

It is an amenable number.

76530381 is a deficient number, since it is larger than the sum of its proper divisors (27898419).

76530381 is a wasteful number, since it uses less digits than its factorization.

76530381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3508.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 76530381 is about 8748.1644360403. The cubic root of 76530381 is about 424.5654261456.

The spelling of 76530381 in words is "seventy-six million, five hundred thirty thousand, three hundred eighty-one".