400436429 has 4 divisors (see below), whose sum is σ = 400800576. Its totient is φ = 400072284.

The previous prime is 400436423. The next prime is 400436431. The reversal of 400436429 is 924634004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400436429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400436395 and 400436404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400436423) 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, 180419 + ... + 182624.

It is an arithmetic number, because the mean of its divisors is an integer number (100200144).

Almost surely, 2^400436429 is an apocalyptic number.

It is an amenable number.

400436429 is a deficient number, since it is larger than the sum of its proper divisors (364147).

400436429 is a wasteful number, since it uses less digits than its factorization.

400436429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364146.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 400436429 is about 20010.9077505245. The cubic root of 400436429 is about 737.0741720261.

The spelling of 400436429 in words is "four hundred million, four hundred thirty-six thousand, four hundred twenty-nine".