388066837 has 8 divisors (see below), whose sum is σ = 413026776. Its totient is φ = 363343872.

The previous prime is 388066823. The next prime is 388066867. The reversal of 388066837 is 738660883.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16695396 + 371371441 = 4086^2 + 19271^2 .

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 388066837 - 2⁷ = 388066709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388066807) 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, 55858 + ... + 62419.

It is an arithmetic number, because the mean of its divisors is an integer number (51628347).

Almost surely, 2^388066837 is an apocalyptic number.

It is an amenable number.

388066837 is a deficient number, since it is larger than the sum of its proper divisors (24959939).

388066837 is a wasteful number, since it uses less digits than its factorization.

388066837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118487.

The product of its (nonzero) digits is 1161216, while the sum is 49.

The square root of 388066837 is about 19699.4120978267. The cubic root of 388066837 is about 729.4051806884.

The spelling of 388066837 in words is "three hundred eighty-eight million, sixty-six thousand, eight hundred thirty-seven".