1219064378 has 16 divisors (see below), whose sum is σ = 2111371584. Its totient is φ = 517069440.

The previous prime is 1219064369. The next prime is 1219064381. The reversal of 1219064378 is 8734609121.

It is a super-2 number, since 2×1219064378² = 2972235915417053768, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 447488 + ... + 450203.

It is an arithmetic number, because the mean of its divisors is an integer number (131960724).

Almost surely, 2^1219064378 is an apocalyptic number.

1219064378 is a deficient number, since it is larger than the sum of its proper divisors (892307206).

1219064378 is an equidigital number, since it uses as much as digits as its factorization.

1219064378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897797.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 1219064378 is about 34915.1024343335. The cubic root of 1219064378 is about 1068.2565073073.

The spelling of 1219064378 in words is "one billion, two hundred nineteen million, sixty-four thousand, three hundred seventy-eight".