1899426401 has 8 divisors (see below), whose sum is σ = 1945177344. Its totient is φ = 1853747280.

The previous prime is 1899426391. The next prime is 1899426407. The reversal of 1899426401 is 1046249981.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1899426401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1899426407) 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, 37616 + ... + 72206.

It is an arithmetic number, because the mean of its divisors is an integer number (243147168).

Almost surely, 2^1899426401 is an apocalyptic number.

It is an amenable number.

1899426401 is a deficient number, since it is larger than the sum of its proper divisors (45750943).

1899426401 is a wasteful number, since it uses less digits than its factorization.

1899426401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35911.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 1899426401 is about 43582.4093069670. The cubic root of 1899426401 is about 1238.4376788200.

The spelling of 1899426401 in words is "one billion, eight hundred ninety-nine million, four hundred twenty-six thousand, four hundred one".