1990656003 has 16 divisors (see below), whose sum is σ = 3165267456. Its totient is φ = 1088060160.

The previous prime is 1990655993. The next prime is 1990656007. The reversal of 1990656003 is 3006560991.

It is not a de Polignac number, because 1990656003 - 2⁶ = 1990655939 is a prime.

It is a super-2 number, since 2×1990656003² = 7925422644559872018, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1990656007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2060238 + ... + 2061203.

It is an arithmetic number, because the mean of its divisors is an integer number (197829216).

Almost surely, 2^1990656003 is an apocalyptic number.

1990656003 is a deficient number, since it is larger than the sum of its proper divisors (1174611453).

1990656003 is a wasteful number, since it uses less digits than its factorization.

1990656003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4121474.

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 1990656003 is about 44616.7681819291. The cubic root of 1990656003 is about 1257.9558698522.

The spelling of 1990656003 in words is "one billion, nine hundred ninety million, six hundred fifty-six thousand, three".