400355629 has 2 divisors, whose sum is σ = 400355630. Its totient is φ = 400355628.

The previous prime is 400355621. The next prime is 400355639. The reversal of 400355629 is 926553004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 400080004 + 275625 = 20002^2 + 525^2 .

It is a cyclic number.

It is not a de Polignac number, because 400355629 - 2³ = 400355621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400355594 and 400355603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400355621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200177814 + 200177815.

It is an arithmetic number, because the mean of its divisors is an integer number (200177815).

Almost surely, 2^400355629 is an apocalyptic number.

It is an amenable number.

400355629 is a deficient number, since it is larger than the sum of its proper divisors (1).

400355629 is an equidigital number, since it uses as much as digits as its factorization.

400355629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 400355629 is about 20008.8887497532. Note that the first 3 decimals coincide. The cubic root of 400355629 is about 737.0245931209.

The spelling of 400355629 in words is "four hundred million, three hundred fifty-five thousand, six hundred twenty-nine".