81792074 has 96 divisors (see below), whose sum is σ = 168537600. Its totient is φ = 29393280.

The previous prime is 81792041. The next prime is 81792103. The reversal of 81792074 is 47029718.

It is a super-3 number, since 3×81792074³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 750332 + ... + 750440.

It is an arithmetic number, because the mean of its divisors is an integer number (1755600).

Almost surely, 2^81792074 is an apocalyptic number.

81792074 is an abundant number, since it is smaller than the sum of its proper divisors (86745526).

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

81792074 is a wasteful number, since it uses less digits than its factorization.

81792074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 81792074 is about 9043.8970582377. The cubic root of 81792074 is about 434.0806301806.

The spelling of 81792074 in words is "eighty-one million, seven hundred ninety-two thousand, seventy-four".