1428390920990 has 32 divisors (see below), whose sum is σ = 2852380033920. Its totient is φ = 510611236000.

The previous prime is 1428390920989. The next prime is 1428390921017. The reversal of 1428390920990 is 990290938241.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110039036 + ... + 110052015.

It is an arithmetic number, because the mean of its divisors is an integer number (89136876060).

Almost surely, 2^{1428390920990} is an apocalyptic number.

1428390920990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1428390920990 is a deficient number, since it is larger than the sum of its proper divisors (1423989112930).

1428390920990 is a wasteful number, since it uses less digits than its factorization.

1428390920990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220091128.

The product of its (nonzero) digits is 2519424, while the sum is 56.

The spelling of 1428390920990 in words is "one trillion, four hundred twenty-eight billion, three hundred ninety million, nine hundred twenty thousand, nine hundred ninety".