27401431989 has 16 divisors (see below), whose sum is σ = 38760980480. Its totient is φ = 17169894000.

The previous prime is 27401431979. The next prime is 27401432029. The reversal of 27401431989 is 98913410472.

It is not a de Polignac number, because 27401431989 - 2⁴ = 27401431973 is a prime.

It is a super-2 number, since 2×27401431989² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27401431979) 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, 1885387 + ... + 1899864.

It is an arithmetic number, because the mean of its divisors is an integer number (2422561280).

Almost surely, 2^27401431989 is an apocalyptic number.

It is an amenable number.

27401431989 is a deficient number, since it is larger than the sum of its proper divisors (11359548491).

27401431989 is a wasteful number, since it uses less digits than its factorization.

27401431989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3785400.

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 27401431989 in words is "twenty-seven billion, four hundred one million, four hundred thirty-one thousand, nine hundred eighty-nine".