1023451990 has 16 divisors (see below), whose sum is σ = 2009687760. Its totient is φ = 372164320.

The previous prime is 1023451921. The next prime is 1023452039. The reversal of 1023451990 is 991543201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4651945 + ... + 4652164.

It is an arithmetic number, because the mean of its divisors is an integer number (125605485).

Almost surely, 2^1023451990 is an apocalyptic number.

1023451990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1023451990 is a deficient number, since it is larger than the sum of its proper divisors (986235770).

1023451990 is a wasteful number, since it uses less digits than its factorization.

1023451990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9304127.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 1023451990 is about 31991.4361978327. The cubic root of 1023451990 is about 1007.7570033171.

The spelling of 1023451990 in words is "one billion, twenty-three million, four hundred fifty-one thousand, nine hundred ninety".