80406356 has 6 divisors (see below), whose sum is σ = 140711130. Its totient is φ = 40203176.

The previous prime is 80406349. The next prime is 80406373. The reversal of 80406356 is 65360408.

It can be written as a sum of positive squares in only one way, i.e., 72931600 + 7474756 = 8540^2 + 2734^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050791 + ... + 10050798.

It is an arithmetic number, because the mean of its divisors is an integer number (23451855).

Almost surely, 2^80406356 is an apocalyptic number.

It is an amenable number.

80406356 is a deficient number, since it is larger than the sum of its proper divisors (60304774).

80406356 is a wasteful number, since it uses less digits than its factorization.

80406356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20101593 (or 20101591 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 80406356 is about 8966.9591278203. The cubic root of 80406356 is about 431.6152624514.

The spelling of 80406356 in words is "eighty million, four hundred six thousand, three hundred fifty-six".