993420290 has 16 divisors (see below), whose sum is σ = 1803982968. Its totient is φ = 393851136.

The previous prime is 993420251. The next prime is 993420299. The reversal of 993420290 is 92024399.

It can be written as a sum of positive squares in 4 ways, for example, as 207907561 + 785512729 = 14419^2 + 28027^2 .

It is not an unprimeable number, because it can be changed into a prime (993420299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 438437 + ... + 440696.

Almost surely, 2^993420290 is an apocalyptic number.

993420290 is a deficient number, since it is larger than the sum of its proper divisors (810562678).

993420290 is a wasteful number, since it uses less digits than its factorization.

993420290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879253.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 993420290 is about 31518.5705576887. The cubic root of 993420290 is about 997.8019353853.

The spelling of 993420290 in words is "nine hundred ninety-three million, four hundred twenty thousand, two hundred ninety".