388431617 has 16 divisors (see below), whose sum is σ = 451110912. Its totient is φ = 327583440.

The previous prime is 388431583. The next prime is 388431677. The reversal of 388431617 is 716134883.

It is a cyclic number.

It is not a de Polignac number, because 388431617 - 2¹⁰ = 388430593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (388431677) 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, 156218 + ... + 158684.

It is an arithmetic number, because the mean of its divisors is an integer number (28194432).

Almost surely, 2^388431617 is an apocalyptic number.

It is an amenable number.

388431617 is a deficient number, since it is larger than the sum of its proper divisors (62679295).

388431617 is a wasteful number, since it uses less digits than its factorization.

388431617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2828.

The product of its digits is 96768, while the sum is 41.

The square root of 388431617 is about 19708.6685750205. The cubic root of 388431617 is about 729.6336543010.

The spelling of 388431617 in words is "three hundred eighty-eight million, four hundred thirty-one thousand, six hundred seventeen".