1219640000 has 70 divisors (see below), whose sum is σ = 3024410004. Its totient is φ = 487840000.

The previous prime is 1219639987. The next prime is 1219640011. The reversal of 1219640000 is 469121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 24755 + ... + 55245.

Almost surely, 2^1219640000 is an apocalyptic number.

1219640000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1219640000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1512205002).

1219640000 is an abundant number, since it is smaller than the sum of its proper divisors (1804770004).

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

1219640000 is an frugal number, since it uses more digits than its factorization.

1219640000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30523 (or 30498 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1219640000 is about 34923.3446279133. The cubic root of 1219640000 is about 1068.4246185244.

The spelling of 1219640000 in words is "one billion, two hundred nineteen million, six hundred forty thousand".