399262445 has 8 divisors (see below), whose sum is σ = 485180160. Its totient is φ = 315366480.

The previous prime is 399262433. The next prime is 399262463. The reversal of 399262445 is 544262993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 399262445 - 2¹⁴ = 399246061 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 399262396 and 399262405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 505001 + ... + 505790.

It is an arithmetic number, because the mean of its divisors is an integer number (60647520).

Almost surely, 2^399262445 is an apocalyptic number.

It is an amenable number.

399262445 is a deficient number, since it is larger than the sum of its proper divisors (85917715).

399262445 is a wasteful number, since it uses less digits than its factorization.

399262445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010875.

The product of its digits is 466560, while the sum is 44.

The square root of 399262445 is about 19981.5526173518. The cubic root of 399262445 is about 736.3531584580.

The spelling of 399262445 in words is "three hundred ninety-nine million, two hundred sixty-two thousand, four hundred forty-five".