81670362 has 16 divisors (see below), whose sum is σ = 163447200. Its totient is φ = 27205712.

The previous prime is 81670333. The next prime is 81670367. The reversal of 81670362 is 26307618.

It is a super-2 number, since 2×81670362² = 13340096058422088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81670367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8389 + ... + 15287.

It is an arithmetic number, because the mean of its divisors is an integer number (10215450).

Almost surely, 2^81670362 is an apocalyptic number.

81670362 is an abundant number, since it is smaller than the sum of its proper divisors (81776838).

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

81670362 is a wasteful number, since it uses less digits than its factorization.

81670362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8877.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 81670362 is about 9037.1655954730. The cubic root of 81670362 is about 433.8652097574.

The spelling of 81670362 in words is "eighty-one million, six hundred seventy thousand, three hundred sixty-two".