1894072452 has 12 divisors (see below), whose sum is σ = 4419502416. Its totient is φ = 631357480.

The previous prime is 1894072421. The next prime is 1894072469. The reversal of 1894072452 is 2542704981.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78919674 + ... + 78919697.

It is an arithmetic number, because the mean of its divisors is an integer number (368291868).

Almost surely, 2^1894072452 is an apocalyptic number.

1894072452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1894072452 is an abundant number, since it is smaller than the sum of its proper divisors (2525429964).

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

1894072452 is a wasteful number, since it uses less digits than its factorization.

1894072452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157839378 (or 157839376 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 1894072452 is about 43520.9426828050. The cubic root of 1894072452 is about 1237.2729812721.

The spelling of 1894072452 in words is "one billion, eight hundred ninety-four million, seventy-two thousand, four hundred fifty-two".