1620190198 has 16 divisors (see below), whose sum is σ = 2662607376. Its totient is φ = 733287040.

The previous prime is 1620190189. The next prime is 1620190199. The reversal of 1620190198 is 8910910261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620190199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152911 + ... + 163162.

It is an arithmetic number, because the mean of its divisors is an integer number (166412961).

Almost surely, 2^1620190198 is an apocalyptic number.

1620190198 is a deficient number, since it is larger than the sum of its proper divisors (1042417178).

1620190198 is a wasteful number, since it uses less digits than its factorization.

1620190198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316319.

The product of its (nonzero) digits is 7776, while the sum is 37.

The square root of 1620190198 is about 40251.5862793008. The cubic root of 1620190198 is about 1174.5062535147.

The spelling of 1620190198 in words is "one billion, six hundred twenty million, one hundred ninety thousand, one hundred ninety-eight".