399671430 has 16 divisors (see below), whose sum is σ = 959211504. Its totient is φ = 106579040.

The previous prime is 399671383. The next prime is 399671449. The reversal of 399671430 is 34176993.

It is a Curzon number.

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, 6661161 + ... + 6661220.

It is an arithmetic number, because the mean of its divisors is an integer number (59950719).

Almost surely, 2^399671430 is an apocalyptic number.

399671430 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

399671430 is an abundant number, since it is smaller than the sum of its proper divisors (559540074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

399671430 is a wasteful number, since it uses less digits than its factorization.

399671430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13322391.

The product of its (nonzero) digits is 122472, while the sum is 42.

The square root of 399671430 is about 19991.7840624593. The cubic root of 399671430 is about 736.6045007588.

The spelling of 399671430 in words is "three hundred ninety-nine million, six hundred seventy-one thousand, four hundred thirty".