196644890 has 32 divisors (see below), whose sum is σ = 382200336. Its totient is φ = 72414720.

The previous prime is 196644841. The next prime is 196644901. The reversal of 196644890 is 98446691.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 896809 + 195748081 = 947^2 + 13991^2 .

It is a super-2 number, since 2×196644890² = 77338425526224200, 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, 52934 + ... + 56526.

Almost surely, 2^196644890 is an apocalyptic number.

196644890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

196644890 is a deficient number, since it is larger than the sum of its proper divisors (185555446).

196644890 is a wasteful number, since it uses less digits than its factorization.

196644890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4034.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 196644890 is about 14023.0128717049. The cubic root of 196644890 is about 581.5149554759.

The spelling of 196644890 in words is "one hundred ninety-six million, six hundred forty-four thousand, eight hundred ninety".