83681072 has 20 divisors (see below), whose sum is σ = 171669816. Its totient is φ = 39379200.

The previous prime is 83681071. The next prime is 83681083. The reversal of 83681072 is 27018638.

It is a super-2 number, since 2×83681072² = 14005043622138368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (83681071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153554 + ... + 154097.

Almost surely, 2^83681072 is an apocalyptic number.

It is an amenable number.

83681072 is an abundant number, since it is smaller than the sum of its proper divisors (87988744).

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

83681072 is a wasteful number, since it uses less digits than its factorization.

83681072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307676 (or 307670 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 83681072 is about 9147.7358947447. The cubic root of 83681072 is about 437.3969446519.

The spelling of 83681072 in words is "eighty-three million, six hundred eighty-one thousand, seventy-two".