80738820 has 72 divisors (see below), whose sum is σ = 246553944. Its totient is φ = 21385728.

The previous prime is 80738789. The next prime is 80738873. The reversal of 80738820 is 2883708.

It can be written as a sum of positive squares in 4 ways, for example, as 7225344 + 73513476 = 2688^2 + 8574^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26832 + ... + 29688.

Almost surely, 2^80738820 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 80738820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123276972).

80738820 is an abundant number, since it is smaller than the sum of its proper divisors (165815124).

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

80738820 is a wasteful number, since it uses less digits than its factorization.

80738820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3029 (or 3024 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 80738820 is about 8985.4782844321. The cubic root of 80738820 is about 432.2093249958.

The spelling of 80738820 in words is "eighty million, seven hundred thirty-eight thousand, eight hundred twenty".