80400746 has 4 divisors (see below), whose sum is σ = 120601122. Its totient is φ = 40200372.

The previous prime is 80400721. The next prime is 80400751. The reversal of 80400746 is 64700408.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 79477225 + 923521 = 8915^2 + 961^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20100185 + ... + 20100188.

Almost surely, 2^80400746 is an apocalyptic number.

80400746 is a deficient number, since it is larger than the sum of its proper divisors (40200376).

80400746 is a wasteful number, since it uses less digits than its factorization.

80400746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40200375.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 80400746 is about 8966.6463072879. The cubic root of 80400746 is about 431.6052241988.

The spelling of 80400746 in words is "eighty million, four hundred thousand, seven hundred forty-six".