400432149 has 18 divisors (see below), whose sum is σ = 626319330. Its totient is φ = 246418848.

The previous prime is 400432147. The next prime is 400432159. The reversal of 400432149 is 941234004.

400432149 is a `hidden beast` number, since 400 + 43 + 214 + 9 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 53802225 + 346629924 = 7335^2 + 18618^2 .

It is not a de Polignac number, because 400432149 - 2¹ = 400432147 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400432141) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 130114 + ... + 133155.

Almost surely, 2^400432149 is an apocalyptic number.

It is an amenable number.

400432149 is a deficient number, since it is larger than the sum of its proper divisors (225887181).

400432149 is a wasteful number, since it uses less digits than its factorization.

400432149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263301 (or 263285 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 400432149 is about 20010.8008085634. The cubic root of 400432149 is about 737.0715459841.

The spelling of 400432149 in words is "four hundred million, four hundred thirty-two thousand, one hundred forty-nine".