400069349 has 8 divisors (see below), whose sum is σ = 413591640. Its totient is φ = 386726400.

The previous prime is 400069333. The next prime is 400069357. The reversal of 400069349 is 943960004.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 669124 + 399400225 = 818^2 + 19985^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400069349 - 2⁴ = 400069333 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 (400069949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40292 + ... + 49229.

It is an arithmetic number, because the mean of its divisors is an integer number (51698955).

Almost surely, 2^400069349 is an apocalyptic number.

It is an amenable number.

400069349 is a deficient number, since it is larger than the sum of its proper divisors (13522291).

400069349 is a wasteful number, since it uses less digits than its factorization.

400069349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89671.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 400069349 is about 20001.7336498615. The cubic root of 400069349 is about 736.8488779176.

The spelling of 400069349 in words is "four hundred million, sixty-nine thousand, three hundred forty-nine".