400402465 has 16 divisors (see below), whose sum is σ = 484218000. Its totient is φ = 317843712.

The previous prime is 400402463. The next prime is 400402487. The reversal of 400402465 is 564204004.

It can be written as a sum of positive squares in 8 ways, for example, as 86545809 + 313856656 = 9303^2 + 17716^2 .

It is a cyclic number.

It is not a de Polignac number, because 400402465 - 2¹ = 400402463 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400402463) 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, 468979 + ... + 469831.

It is an arithmetic number, because the mean of its divisors is an integer number (30263625).

Almost surely, 2^400402465 is an apocalyptic number.

It is an amenable number.

400402465 is a deficient number, since it is larger than the sum of its proper divisors (83815535).

400402465 is a wasteful number, since it uses less digits than its factorization.

400402465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1476.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 400402465 is about 20010.0590953650. The cubic root of 400402465 is about 737.0533325177.

Adding to 400402465 its reverse (564204004), we get a palindrome (964606469).

The spelling of 400402465 in words is "four hundred million, four hundred two thousand, four hundred sixty-five".