1901634394 has 8 divisors (see below), whose sum is σ = 3111765408. Its totient is φ = 864379260.

The previous prime is 1901634353. The next prime is 1901634421. The reversal of 1901634394 is 4934361091.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43218942 + ... + 43218985.

It is an arithmetic number, because the mean of its divisors is an integer number (388970676).

Almost surely, 2^1901634394 is an apocalyptic number.

1901634394 is a deficient number, since it is larger than the sum of its proper divisors (1210131014).

1901634394 is a wasteful number, since it uses less digits than its factorization.

1901634394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86437940.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 1901634394 is about 43607.7331903414. The cubic root of 1901634394 is about 1238.9173679948.

The spelling of 1901634394 in words is "one billion, nine hundred one million, six hundred thirty-four thousand, three hundred ninety-four".