80400465 has 32 divisors (see below), whose sum is σ = 143395200. Its totient is φ = 42742080.

The previous prime is 80400451. The next prime is 80400493. The reversal of 80400465 is 56400408.

It is not a de Polignac number, because 80400465 - 2¹⁰ = 80399441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51750 + ... + 53280.

It is an arithmetic number, because the mean of its divisors is an integer number (4481100).

Almost surely, 2^80400465 is an apocalyptic number.

It is an amenable number.

80400465 is a deficient number, since it is larger than the sum of its proper divisors (62994735).

80400465 is a wasteful number, since it uses less digits than its factorization.

80400465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1934 (or 1928 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 80400465 is about 8966.6306380937. The cubic root of 80400465 is about 431.6047213792.

The spelling of 80400465 in words is "eighty million, four hundred thousand, four hundred sixty-five".