187893309640 has 32 divisors (see below), whose sum is σ = 445010472000. Its totient is φ = 71201674944.

The previous prime is 187893309623. The next prime is 187893309731. The reversal of 187893309640 is 46903398781.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

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, 123613260 + ... + 123614779.

It is an arithmetic number, because the mean of its divisors is an integer number (13906577250).

Almost surely, 2^187893309640 is an apocalyptic number.

187893309640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

187893309640 is an abundant number, since it is smaller than the sum of its proper divisors (257117162360).

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

187893309640 is a wasteful number, since it uses less digits than its factorization.

187893309640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247228069 (or 247228065 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 58.

The spelling of 187893309640 in words is "one hundred eighty-seven billion, eight hundred ninety-three million, three hundred nine thousand, six hundred forty".