990206156 has 12 divisors (see below), whose sum is σ = 1749685392. Its totient is φ = 490296048.

The previous prime is 990206153. The next prime is 990206159. The reversal of 990206156 is 651602099.

It is an interprime number because it is at equal distance from previous prime (990206153) and next prime (990206159).

It is a super-3 number, since 3×990206156³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (990206153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1201295 + ... + 1202118.

It is an arithmetic number, because the mean of its divisors is an integer number (145807116).

Almost surely, 2^990206156 is an apocalyptic number.

It is an amenable number.

990206156 is a deficient number, since it is larger than the sum of its proper divisors (759479236).

990206156 is a wasteful number, since it uses less digits than its factorization.

990206156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2403520 (or 2403518 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 990206156 is about 31467.5413084658. The cubic root of 990206156 is about 996.7246692542.

The spelling of 990206156 in words is "nine hundred ninety million, two hundred six thousand, one hundred fifty-six".