400352149 has 4 divisors (see below), whose sum is σ = 400686700. Its totient is φ = 400017600.

The previous prime is 400352137. The next prime is 400352153. The reversal of 400352149 is 941253004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46648900 + 353703249 = 6830^2 + 18807^2 .

It is a cyclic number.

It is not a de Polignac number, because 400352149 - 2¹⁹ = 399827861 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 (400352179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165474 + ... + 167875.

It is an arithmetic number, because the mean of its divisors is an integer number (100171675).

Almost surely, 2^400352149 is an apocalyptic number.

It is an amenable number.

400352149 is a deficient number, since it is larger than the sum of its proper divisors (334551).

400352149 is a wasteful number, since it uses less digits than its factorization.

400352149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334550.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 400352149 is about 20008.8017882131. The cubic root of 400352149 is about 737.0224576420.

The spelling of 400352149 in words is "four hundred million, three hundred fifty-two thousand, one hundred forty-nine".