387474789 has 8 divisors (see below), whose sum is σ = 556374112. Its totient is φ = 238446000.

The previous prime is 387474781. The next prime is 387474833. The reversal of 387474789 is 987474783.

It is a happy number.

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

It is not a de Polignac number, because 387474789 - 2³ = 387474781 is a prime.

It is a super-2 number, since 2×387474789² = 300273424221189042, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387474781) 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, 4967587 + ... + 4967664.

It is an arithmetic number, because the mean of its divisors is an integer number (69546764).

Almost surely, 2^387474789 is an apocalyptic number.

387474789 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

387474789 is a deficient number, since it is larger than the sum of its proper divisors (168899323).

387474789 is a wasteful number, since it uses less digits than its factorization.

387474789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9935267.

The product of its digits is 9483264, while the sum is 57.

The square root of 387474789 is about 19684.3793145733. The cubic root of 387474789 is about 729.0340567522.

The spelling of 387474789 in words is "three hundred eighty-seven million, four hundred seventy-four thousand, seven hundred eighty-nine".