27431890242 has 32 divisors (see below), whose sum is σ = 55666704384. Its totient is φ = 9011038800.

The previous prime is 27431890231. The next prime is 27431890249. The reversal of 27431890242 is 24209813472.

It is a junction number, because it is equal to n+sod(n) for n = 27431890194 and 27431890203.

It is not an unprimeable number, because it can be changed into a prime (27431890249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10767 + ... + 234477.

It is an arithmetic number, because the mean of its divisors is an integer number (1739584512).

Almost surely, 2^27431890242 is an apocalyptic number.

27431890242 is an abundant number, since it is smaller than the sum of its proper divisors (28234814142).

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

27431890242 is a wasteful number, since it uses less digits than its factorization.

27431890242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224014.

The product of its (nonzero) digits is 193536, while the sum is 42.

The spelling of 27431890242 in words is "twenty-seven billion, four hundred thirty-one million, eight hundred ninety thousand, two hundred forty-two".