80215740 has 216 divisors, whose sum is σ = 278853120. Its totient is φ = 18627840.

The previous prime is 80215717. The next prime is 80215763. The reversal of 80215740 is 4751208.

It is an interprime number because it is at equal distance from previous prime (80215717) and next prime (80215763).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 631557 + ... + 631683.

Almost surely, 2^80215740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80215740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139426560).

80215740 is an abundant number, since it is smaller than the sum of its proper divisors (198637380).

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

80215740 is a wasteful number, since it uses less digits than its factorization.

80215740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 80215740 is about 8956.3240227227. The cubic root of 80215740 is about 431.2739217984.

Adding to 80215740 its reverse (4751208), we get a palindrome (84966948).

The spelling of 80215740 in words is "eighty million, two hundred fifteen thousand, seven hundred forty".