81476190 has 24 divisors (see below), whose sum is σ = 211838328. Its totient is φ = 21726960.

The previous prime is 81476179. The next prime is 81476191. The reversal of 81476190 is 9167418.

It is a super-2 number, since 2×81476190² = 13276739073832200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81476191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 452556 + ... + 452735.

It is an arithmetic number, because the mean of its divisors is an integer number (8826597).

Almost surely, 2^81476190 is an apocalyptic number.

81476190 is an abundant number, since it is smaller than the sum of its proper divisors (130362138).

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

81476190 is a wasteful number, since it uses less digits than its factorization.

81476190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905304 (or 905301 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 81476190 is about 9026.4162323704. The cubic root of 81476190 is about 433.5210974594.

The spelling of 81476190 in words is "eighty-one million, four hundred seventy-six thousand, one hundred ninety".