400023435 has 32 divisors (see below), whose sum is σ = 769973760. Its totient is φ = 173242368.

The previous prime is 400023431. The next prime is 400023461. The reversal of 400023435 is 534320004.

It is a happy number.

It is not a de Polignac number, because 400023435 - 2² = 400023431 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (400023431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98262 + ... + 102251.

It is an arithmetic number, because the mean of its divisors is an integer number (24061680).

Almost surely, 2^400023435 is an apocalyptic number.

400023435 is a deficient number, since it is larger than the sum of its proper divisors (369950325).

400023435 is a wasteful number, since it uses less digits than its factorization.

400023435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200547.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 400023435 is about 20000.5858664190. The cubic root of 400023435 is about 736.8206886601.

Adding to 400023435 its reverse (534320004), we get a palindrome (934343439).

The spelling of 400023435 in words is "four hundred million, twenty-three thousand, four hundred thirty-five".