1022999990 has 16 divisors (see below), whose sum is σ = 1949717952. Its totient is φ = 385129344.

The previous prime is 1022999987. The next prime is 1023000023. The reversal of 1022999990 is 999992201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3008654 + ... + 3008993.

It is an arithmetic number, because the mean of its divisors is an integer number (121857372).

Almost surely, 2^1022999990 is an apocalyptic number.

1022999990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1022999990 is a deficient number, since it is larger than the sum of its proper divisors (926717962).

1022999990 is a wasteful number, since it uses less digits than its factorization.

1022999990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6017671.

The product of its (nonzero) digits is 236196, while the sum is 50.

The square root of 1022999990 is about 31984.3710271126. The cubic root of 1022999990 is about 1007.6086253298.

The spelling of 1022999990 in words is "one billion, twenty-two million, nine hundred ninety-nine thousand, nine hundred ninety".