408198261 has 16 divisors (see below), whose sum is σ = 580763840. Its totient is φ = 254275200.

The previous prime is 408198253. The next prime is 408198277. The reversal of 408198261 is 162891804.

It is not a de Polignac number, because 408198261 - 2³ = 408198253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408198211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44890 + ... + 53211.

It is an arithmetic number, because the mean of its divisors is an integer number (36297740).

Almost surely, 2^408198261 is an apocalyptic number.

It is an amenable number.

408198261 is a deficient number, since it is larger than the sum of its proper divisors (172565579).

408198261 is a wasteful number, since it uses less digits than its factorization.

408198261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98196.

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 408198261 is about 20203.9169717162. The cubic root of 408198261 is about 741.8060711628.

The spelling of 408198261 in words is "four hundred eight million, one hundred ninety-eight thousand, two hundred sixty-one".