399288571 has 16 divisors (see below), whose sum is σ = 473683680. Its totient is φ = 332398080.

The previous prime is 399288437. The next prime is 399288599. The reversal of 399288571 is 175882993.

It is a cyclic number.

It is not a de Polignac number, because 399288571 - 2¹⁵ = 399255803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399288871) 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, 21936 + ... + 35773.

It is an arithmetic number, because the mean of its divisors is an integer number (29605230).

Almost surely, 2^399288571 is an apocalyptic number.

399288571 is a deficient number, since it is larger than the sum of its proper divisors (74395109).

399288571 is a wasteful number, since it uses less digits than its factorization.

399288571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57774.

The product of its digits is 1088640, while the sum is 52.

The square root of 399288571 is about 19982.2063596591. The cubic root of 399288571 is about 736.3692193584.

The spelling of 399288571 in words is "three hundred ninety-nine million, two hundred eighty-eight thousand, five hundred seventy-one".