388240901 has 4 divisors (see below), whose sum is σ = 391204704. Its totient is φ = 385277100.

The previous prime is 388240861. The next prime is 388240961. The reversal of 388240901 is 109042883.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 109042883 = 43 ⋅2535881.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-388240901 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 (388240961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1481705 + ... + 1481966.

It is an arithmetic number, because the mean of its divisors is an integer number (97801176).

Almost surely, 2^388240901 is an apocalyptic number.

It is an amenable number.

388240901 is a deficient number, since it is larger than the sum of its proper divisors (2963803).

388240901 is a wasteful number, since it uses less digits than its factorization.

388240901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2963802.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 388240901 is about 19703.8296023895. The cubic root of 388240901 is about 729.5142205008.

The spelling of 388240901 in words is "three hundred eighty-eight million, two hundred forty thousand, nine hundred one".