978776469 has 24 divisors (see below), whose sum is σ = 1623492000. Its totient is φ = 561975840.

The previous prime is 978776459. The next prime is 978776473. The reversal of 978776469 is 964677879.

978776469 is a `hidden beast` number, since 97 + 87 + 7 + 6 + 469 = 666.

It is not a de Polignac number, because 978776469 - 2⁷ = 978776341 is a prime.

It is a super-2 number, since 2×978776469² = 1916006752536215922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978776459) 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 23 ways as a sum of consecutive naturals, for example, 258294 + ... + 262055.

It is an arithmetic number, because the mean of its divisors is an integer number (67645500).

Almost surely, 2^978776469 is an apocalyptic number.

978776469 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

It is an amenable number.

978776469 is a deficient number, since it is larger than the sum of its proper divisors (644715531).

978776469 is a wasteful number, since it uses less digits than its factorization.

978776469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520385 (or 520382 counting only the distinct ones).

The product of its digits is 32006016, while the sum is 63.

The square root of 978776469 is about 31285.4034495322. The cubic root of 978776469 is about 992.8748423718.

The spelling of 978776469 in words is "nine hundred seventy-eight million, seven hundred seventy-six thousand, four hundred sixty-nine".