406261899 has 40 divisors (see below), whose sum is σ = 634640160. Its totient is φ = 258660864.

The previous prime is 406261879. The next prime is 406261901. The reversal of 406261899 is 998162604.

It is a happy number.

406261899 is a `hidden beast` number, since 4 + 0 + 626 + 18 + 9 + 9 = 666.

It is not a de Polignac number, because 406261899 - 2¹⁶ = 406196363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (406261859) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 226962 + ... + 228744.

It is an arithmetic number, because the mean of its divisors is an integer number (15866004).

Almost surely, 2^406261899 is an apocalyptic number.

406261899 is a deficient number, since it is larger than the sum of its proper divisors (228378261).

406261899 is a wasteful number, since it uses less digits than its factorization.

406261899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1921 (or 1912 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 406261899 is about 20155.9395464464. The cubic root of 406261899 is about 740.6312479524.

The spelling of 406261899 in words is "four hundred six million, two hundred sixty-one thousand, eight hundred ninety-nine".