11621898 has 12 divisors (see below), whose sum is σ = 25180818. Its totient is φ = 3873960.

The previous prime is 11621873. The next prime is 11621921. The reversal of 11621898 is 89812611.

It can be written as a sum of positive squares in only one way, i.e., 10870209 + 751689 = 3297^2 + 867^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 322813 + ... + 322848.

Almost surely, 2^11621898 is an apocalyptic number.

11621898 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11621898 is an abundant number, since it is smaller than the sum of its proper divisors (13558920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11621898 is a wasteful number, since it uses less digits than its factorization.

11621898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645669 (or 645666 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The square root of 11621898 is about 3409.0904945454. The cubic root of 11621898 is about 226.5125937766.

The spelling of 11621898 in words is "eleven million, six hundred twenty-one thousand, eight hundred ninety-eight".