399200784074 has 4 divisors (see below), whose sum is σ = 598801176114. Its totient is φ = 199600392036.

The previous prime is 399200784061. The next prime is 399200784079. The reversal of 399200784074 is 470487002993.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 321780504049 + 77420280025 = 567257^2 + 278245^2 .

It is a super-2 number, since 2×399200784074² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (399200784079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99800196017 + ... + 99800196020.

Almost surely, 2^399200784074 is an apocalyptic number.

399200784074 is a deficient number, since it is larger than the sum of its proper divisors (199600392040).

399200784074 is a wasteful number, since it uses less digits than its factorization.

399200784074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199600392039.

The product of its (nonzero) digits is 3048192, while the sum is 53.

The spelling of 399200784074 in words is "three hundred ninety-nine billion, two hundred million, seven hundred eighty-four thousand, seventy-four".