1219400469 has 48 divisors (see below), whose sum is σ = 2109153280. Its totient is φ = 664187040.

The previous prime is 1219400467. The next prime is 1219400489. The reversal of 1219400469 is 9640049121.

It is a happy number.

1219400469 is a `hidden beast` number, since 1 + 2 + 194 + 0 + 0 + 469 = 666.

It is not a de Polignac number, because 1219400469 - 2¹ = 1219400467 is a prime.

It is a super-2 number, since 2×1219400469² = 2973875007594839922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1219400461) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 126192 + ... + 135510.

Almost surely, 2^1219400469 is an apocalyptic number.

It is an amenable number.

1219400469 is a deficient number, since it is larger than the sum of its proper divisors (889752811).

1219400469 is a wasteful number, since it uses less digits than its factorization.

1219400469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9430 (or 9427 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 1219400469 is about 34919.9150772163. The cubic root of 1219400469 is about 1068.3546695851.

The spelling of 1219400469 in words is "one billion, two hundred nineteen million, four hundred thousand, four hundred sixty-nine".