40023123434 has 8 divisors (see below), whose sum is σ = 68611068768. Its totient is φ = 17152767180.

The previous prime is 40023123431. The next prime is 40023123451. The reversal of 40023123434 is 43432132004.

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

It is a super-3 number, since 3×40023123434³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (40023123431) 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, 1429397252 + ... + 1429397279.

It is an arithmetic number, because the mean of its divisors is an integer number (8576383596).

Almost surely, 2^40023123434 is an apocalyptic number.

40023123434 is a deficient number, since it is larger than the sum of its proper divisors (28587945334).

40023123434 is a wasteful number, since it uses less digits than its factorization.

40023123434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2858794540.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 40023123434 its reverse (43432132004), we get a palindrome (83455255438).

The spelling of 40023123434 in words is "forty billion, twenty-three million, one hundred twenty-three thousand, four hundred thirty-four".