388452457 has 4 divisors (see below), whose sum is σ = 388495440. Its totient is φ = 388409476.

The previous prime is 388452439. The next prime is 388452469. The reversal of 388452457 is 754254883.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 388452457 - 2¹⁹ = 387928169 is a prime.

It is a super-5 number, since 5×388452457⁵ (a number of 44 digits) contains 55555 as substring. Note that it is a super-d number also for d = 3, 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388452437) 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, 2107 + ... + 27952.

It is an arithmetic number, because the mean of its divisors is an integer number (97123860).

Almost surely, 2^388452457 is an apocalyptic number.

It is an amenable number.

388452457 is a deficient number, since it is larger than the sum of its proper divisors (42983).

388452457 is a wasteful number, since it uses less digits than its factorization.

388452457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42982.

The product of its digits is 1075200, while the sum is 46.

The square root of 388452457 is about 19709.1972692954. The cubic root of 388452457 is about 729.6467027526.

The spelling of 388452457 in words is "three hundred eighty-eight million, four hundred fifty-two thousand, four hundred fifty-seven".