1219628397 has 8 divisors (see below), whose sum is σ = 1751261344. Its totient is φ = 750540528.

The previous prime is 1219628341. The next prime is 1219628401. The reversal of 1219628397 is 7938269121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1219628397 - 2¹⁰ = 1219627373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1219628317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15636223 + ... + 15636300.

It is an arithmetic number, because the mean of its divisors is an integer number (218907668).

Almost surely, 2^1219628397 is an apocalyptic number.

It is an amenable number.

1219628397 is a deficient number, since it is larger than the sum of its proper divisors (531632947).

1219628397 is a wasteful number, since it uses less digits than its factorization.

1219628397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31272539.

The product of its digits is 326592, while the sum is 48.

The square root of 1219628397 is about 34923.1785065449. The cubic root of 1219628397 is about 1068.4212303743.

The spelling of 1219628397 in words is "one billion, two hundred nineteen million, six hundred twenty-eight thousand, three hundred ninety-seven".