1990284355 has 16 divisors (see below), whose sum is σ = 2517324480. Its totient is φ = 1508311168.

The previous prime is 1990284343. The next prime is 1990284391. The reversal of 1990284355 is 5534820991.

It is a cyclic number.

It is not a de Polignac number, because 1990284355 - 2¹⁵ = 1990251587 is a prime.

It is a super-2 number, since 2×1990284355² = 7922463627515532050, which contains 22 as substring.

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, 121807 + ... + 137176.

It is an arithmetic number, because the mean of its divisors is an integer number (157332780).

Almost surely, 2^1990284355 is an apocalyptic number.

1990284355 is a deficient number, since it is larger than the sum of its proper divisors (527040125).

1990284355 is a wasteful number, since it uses less digits than its factorization.

1990284355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259070.

The product of its (nonzero) digits is 388800, while the sum is 46.

The square root of 1990284355 is about 44612.6030959862. The cubic root of 1990284355 is about 1257.8775797676.

The spelling of 1990284355 in words is "one billion, nine hundred ninety million, two hundred eighty-four thousand, three hundred fifty-five".