81692148 has 24 divisors (see below), whose sum is σ = 190778560. Its totient is φ = 27207360.

The previous prime is 81692129. The next prime is 81692179. The reversal of 81692148 is 84129618.

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, 17193 + ... + 21423.

Almost surely, 2^81692148 is an apocalyptic number.

It is an amenable number.

81692148 is an abundant number, since it is smaller than the sum of its proper divisors (109086412).

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

81692148 is a wasteful number, since it uses less digits than its factorization.

81692148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5847 (or 5845 counting only the distinct ones).

The product of its digits is 27648, while the sum is 39.

The square root of 81692148 is about 9038.3708709037. The cubic root of 81692148 is about 433.9037849389.

The spelling of 81692148 in words is "eighty-one million, six hundred ninety-two thousand, one hundred forty-eight".