469138990 has 16 divisors (see below), whose sum is σ = 845235648. Its totient is φ = 187481056.

The previous prime is 469138973. The next prime is 469138993. The reversal of 469138990 is 99831964.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (469138993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10237 + ... + 32296.

It is an arithmetic number, because the mean of its divisors is an integer number (52827228).

Almost surely, 2^469138990 is an apocalyptic number.

469138990 is a deficient number, since it is larger than the sum of its proper divisors (376096658).

469138990 is a wasteful number, since it uses less digits than its factorization.

469138990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43643.

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 469138990 is about 21659.6165709368. The cubic root of 469138990 is about 777.0229439439.

It can be divided in two parts, 4691 and 38990, that added together give a square (43681 = 209²).

The spelling of 469138990 in words is "four hundred sixty-nine million, one hundred thirty-eight thousand, nine hundred ninety".