1893045990 has 32 divisors (see below), whose sum is σ = 4956339456. Its totient is φ = 458920160.

The previous prime is 1893045967. The next prime is 1893045991. The reversal of 1893045990 is 995403981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1893045991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2867922 + ... + 2868581.

It is an arithmetic number, because the mean of its divisors is an integer number (154885608).

Almost surely, 2^1893045990 is an apocalyptic number.

1893045990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1893045990 is an abundant number, since it is smaller than the sum of its proper divisors (3063293466).

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

1893045990 is a wasteful number, since it uses less digits than its factorization.

1893045990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5736524.

The product of its (nonzero) digits is 349920, while the sum is 48.

The square root of 1893045990 is about 43509.1483483646. The cubic root of 1893045990 is about 1237.0494341760.

The spelling of 1893045990 in words is "one billion, eight hundred ninety-three million, forty-five thousand, nine hundred ninety".