406707889 has 27 divisors (see below), whose sum is σ = 491704857. Its totient is φ = 335417544.

The previous prime is 406707887. The next prime is 406707907. The reversal of 406707889 is 988707604.

The square root of 406707889 is 20167.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 406707889 - 2¹ = 406707887 is a prime.

It is a super-2 number, since 2×406707889² = 330822613949672642, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (406707887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 6070234 + ... + 6070300.

It is an arithmetic number, because the mean of its divisors is an integer number (18211291).

Almost surely, 2^406707889 is an apocalyptic number.

406707889 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

406707889 is the 20167-th square number.

406707889 is the 10084-th centered octagonal number.

It is an amenable number.

406707889 is a deficient number, since it is larger than the sum of its proper divisors (84996968).

406707889 is an frugal number, since it uses more digits than its factorization.

406707889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 49.

The cubic root of 406707889 is about 740.9021678795.

Multiplying 406707889 by its sum of digits (49), we get a square (19928686561 = 141169²).

406707889 divided by its sum of digits (49) gives a square (8300161 = 2881²).

The spelling of 406707889 in words is "four hundred six million, seven hundred seven thousand, eight hundred eighty-nine".