387434881 has 8 divisors (see below), whose sum is σ = 402945920. Its totient is φ = 372189168.

The previous prime is 387434857. The next prime is 387434897. The reversal of 387434881 is 188434783.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 387434881 - 2⁵ = 387434849 is a prime.

It is a super-2 number, since 2×387434881² = 300211574030968322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387464881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63351 + ... + 69196.

It is an arithmetic number, because the mean of its divisors is an integer number (50368240).

Almost surely, 2^387434881 is an apocalyptic number.

It is an amenable number.

387434881 is a deficient number, since it is larger than the sum of its proper divisors (15511039).

387434881 is a wasteful number, since it uses less digits than its factorization.

387434881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132663.

The product of its digits is 516096, while the sum is 46.

The square root of 387434881 is about 19683.3655912804. The cubic root of 387434881 is about 729.0090269173.

The spelling of 387434881 in words is "three hundred eighty-seven million, four hundred thirty-four thousand, eight hundred eighty-one".