1961344398 has 32 divisors (see below), whose sum is σ = 4245696000. Its totient is φ = 600453216.

The previous prime is 1961344397. The next prime is 1961344403. The reversal of 1961344398 is 8934431691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961344391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47658 + ... + 78701.

It is an arithmetic number, because the mean of its divisors is an integer number (132678000).

Almost surely, 2^1961344398 is an apocalyptic number.

1961344398 is an abundant number, since it is smaller than the sum of its proper divisors (2284351602).

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

1961344398 is a wasteful number, since it uses less digits than its factorization.

1961344398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126576.

The product of its digits is 559872, while the sum is 48.

The square root of 1961344398 is about 44287.0680673264. The cubic root of 1961344398 is about 1251.7510175780.

The spelling of 1961344398 in words is "one billion, nine hundred sixty-one million, three hundred forty-four thousand, three hundred ninety-eight".