400023434 has 8 divisors (see below), whose sum is σ = 604615968. Its totient is φ = 198484780.

The previous prime is 400023431. The next prime is 400023461. The reversal of 400023434 is 434320004.

It is a happy number.

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

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 3 ways as a sum of consecutive naturals, for example, 763142 + ... + 763665.

It is an arithmetic number, because the mean of its divisors is an integer number (75576996).

Almost surely, 2^400023434 is an apocalyptic number.

400023434 is a deficient number, since it is larger than the sum of its proper divisors (204592534).

400023434 is a wasteful number, since it uses less digits than its factorization.

400023434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1526940.

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 400023434 is about 20000.5858414197. The cubic root of 400023434 is about 736.8206880461.

Adding to 400023434 its reverse (434320004), we get a palindrome (834343438).

The spelling of 400023434 in words is "four hundred million, twenty-three thousand, four hundred thirty-four".