399422750 has 32 divisors (see below), whose sum is σ = 787082400. Its totient is φ = 151358400.

The previous prime is 399422741. The next prime is 399422753. The reversal of 399422750 is 57224993.

It is a junction number, because it is equal to n+sod(n) for n = 399422698 and 399422707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399422753) 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, 37295 + ... + 46794.

It is an arithmetic number, because the mean of its divisors is an integer number (24596325).

Almost surely, 2^399422750 is an apocalyptic number.

399422750 is a deficient number, since it is larger than the sum of its proper divisors (387659650).

399422750 is a wasteful number, since it uses less digits than its factorization.

399422750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84125 (or 84115 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 399422750 is about 19985.5635397154. The cubic root of 399422750 is about 736.4516945630.

The spelling of 399422750 in words is "three hundred ninety-nine million, four hundred twenty-two thousand, seven hundred fifty".