399162870 has 32 divisors (see below), whose sum is σ = 1064435040. Its totient is φ = 106443360.

The previous prime is 399162847. The next prime is 399162871. The reversal of 399162870 is 78261993.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399162871) 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, 738921 + ... + 739460.

It is an arithmetic number, because the mean of its divisors is an integer number (33263595).

Almost surely, 2^399162870 is an apocalyptic number.

399162870 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

399162870 is an abundant number, since it is smaller than the sum of its proper divisors (665272170).

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

399162870 is a wasteful number, since it uses less digits than its factorization.

399162870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478397 (or 1478391 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 399162870 is about 19979.0607887358. The cubic root of 399162870 is about 736.2919385236.

The spelling of 399162870 in words is "three hundred ninety-nine million, one hundred sixty-two thousand, eight hundred seventy".