3698890 has 32 divisors (see below), whose sum is σ = 7373520. Its totient is φ = 1327104.

The previous prime is 3698881. The next prime is 3698909. The reversal of 3698890 is 988963.

3698890 = 298² + 299² + ... + 334².

It can be written as a sum of positive squares in 8 ways, for example, as 1505529 + 2193361 = 1227^2 + 1481^2 .

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 4426 + ... + 5194.

Almost surely, 2^3698890 is an apocalyptic number.

3698890 is the 962-nd decagonal number.

3698890 is a deficient number, since it is larger than the sum of its proper divisors (3674630).

3698890 is a wasteful number, since it uses less digits than its factorization.

3698890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 3698890 is about 1923.2498537632. The cubic root of 3698890 is about 154.6525690265.

The spelling of 3698890 in words is "three million, six hundred ninety-eight thousand, eight hundred ninety".