423997445394 has 24 divisors (see below), whose sum is σ = 918679608912. Its totient is φ = 141329639160.

The previous prime is 423997445353. The next prime is 423997445461. The reversal of 423997445394 is 493544799324.

423997445394 is a `hidden beast` number, since 4 + 2 + 3 + 9 + 97 + 4 + 4 + 539 + 4 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 807309 + ... + 1224639.

It is an arithmetic number, because the mean of its divisors is an integer number (38278317038).

Almost surely, 2^423997445394 is an apocalyptic number.

423997445394 is an abundant number, since it is smaller than the sum of its proper divisors (494682163518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

423997445394 is a wasteful number, since it uses less digits than its factorization.

423997445394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473782 (or 473779 counting only the distinct ones).

The product of its digits is 117573120, while the sum is 63.

The spelling of 423997445394 in words is "four hundred twenty-three billion, nine hundred ninety-seven million, four hundred forty-five thousand, three hundred ninety-four".