632778369 has 32 divisors (see below), whose sum is σ = 934778880. Its totient is φ = 378715392.

The previous prime is 632778359. The next prime is 632778383. The reversal of 632778369 is 963877236.

It is not a de Polignac number, because 632778369 - 2⁷ = 632778241 is a prime.

It is a super-2 number, since 2×632778369² = 800816928548600322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (632778319) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 688092 + ... + 689010.

It is an arithmetic number, because the mean of its divisors is an integer number (29211840).

Almost surely, 2^632778369 is an apocalyptic number.

632778369 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

632778369 is a deficient number, since it is larger than the sum of its proper divisors (302000511).

632778369 is a wasteful number, since it uses less digits than its factorization.

632778369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1549.

The product of its digits is 2286144, while the sum is 51.

The square root of 632778369 is about 25155.0863445149. The cubic root of 632778369 is about 858.5202464802.

The spelling of 632778369 in words is "six hundred thirty-two million, seven hundred seventy-eight thousand, three hundred sixty-nine".