1921471400 has 24 divisors (see below), whose sum is σ = 4467421470. Its totient is φ = 768588480.

The previous prime is 1921471399. The next prime is 1921471429. The reversal of 1921471400 is 41741291.

It can be written as a sum of positive squares in 3 ways, for example, as 1349974564 + 571496836 = 36742^2 + 23906^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4803479 + ... + 4803878.

Almost surely, 2^1921471400 is an apocalyptic number.

1921471400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1921471400 is an abundant number, since it is smaller than the sum of its proper divisors (2545950070).

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

1921471400 is a wasteful number, since it uses less digits than its factorization.

1921471400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9607373 (or 9607364 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 1921471400 is about 43834.5913634426. The cubic root of 1921471400 is about 1243.2104200543.

The spelling of 1921471400 in words is "one billion, nine hundred twenty-one million, four hundred seventy-one thousand, four hundred".