388087449 has 4 divisors (see below), whose sum is σ = 517449936. Its totient is φ = 258724964.

The previous prime is 388087433. The next prime is 388087451. The reversal of 388087449 is 944780883.

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.

It is a cyclic number.

It is not a de Polignac number, because 388087449 - 2⁴ = 388087433 is a prime.

It is a super-2 number, since 2×388087449² = 301223736142655202, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (388087549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64681239 + ... + 64681244.

It is an arithmetic number, because the mean of its divisors is an integer number (129362484).

Almost surely, 2^388087449 is an apocalyptic number.

It is an amenable number.

388087449 is a deficient number, since it is larger than the sum of its proper divisors (129362487).

388087449 is a wasteful number, since it uses less digits than its factorization.

388087449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129362486.

The product of its (nonzero) digits is 1548288, while the sum is 51.

The square root of 388087449 is about 19699.9352537007. The cubic root of 388087449 is about 729.4180944719.

The spelling of 388087449 in words is "three hundred eighty-eight million, eighty-seven thousand, four hundred forty-nine".