27397966840 has 32 divisors (see below), whose sum is σ = 61687182960. Its totient is φ = 10951763200.

The previous prime is 27397966801. The next prime is 27397966889. The reversal of 27397966840 is 4866979372.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172006 + ... + 290485.

Almost surely, 2^27397966840 is an apocalyptic number.

27397966840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27397966840 is an abundant number, since it is smaller than the sum of its proper divisors (34289216120).

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

27397966840 is a wasteful number, since it uses less digits than its factorization.

27397966840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463983 (or 463979 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 61.

The spelling of 27397966840 in words is "twenty-seven billion, three hundred ninety-seven million, nine hundred sixty-six thousand, eight hundred forty".