1969631478 has 20 divisors (see below), whose sum is σ = 4413433860. Its totient is φ = 656543772.

The previous prime is 1969631453. The next prime is 1969631479. The reversal of 1969631478 is 8741369691.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1969631479) 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 9 ways as a sum of consecutive naturals, for example, 6078948 + ... + 6079271.

It is an arithmetic number, because the mean of its divisors is an integer number (220671693).

Almost surely, 2^1969631478 is an apocalyptic number.

1969631478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1969631478 is an abundant number, since it is smaller than the sum of its proper divisors (2443802382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1969631478 is a wasteful number, since it uses less digits than its factorization.

1969631478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12158233 (or 12158224 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 1969631478 is about 44380.5303934056. The cubic root of 1969631478 is about 1253.5115081844.

The spelling of 1969631478 in words is "one billion, nine hundred sixty-nine million, six hundred thirty-one thousand, four hundred seventy-eight".