75400865 has 8 divisors (see below), whose sum is σ = 95803560. Its totient is φ = 56772352.

The previous prime is 75400861. The next prime is 75400883. The reversal of 75400865 is 56800457.

75400865 = T₁₆₉₄ + T₁₆₉₅ + ... + T₁₇₄₄.

It can be written as a sum of positive squares in 4 ways, for example, as 36675136 + 38725729 = 6056^2 + 6223^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 75400865 - 2² = 75400861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75400861) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 443450 + ... + 443619.

It is an arithmetic number, because the mean of its divisors is an integer number (11975445).

Almost surely, 2^75400865 is an apocalyptic number.

It is an amenable number.

75400865 is a deficient number, since it is larger than the sum of its proper divisors (20402695).

75400865 is a wasteful number, since it uses less digits than its factorization.

75400865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887091.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 75400865 is about 8683.3671464473. The cubic root of 75400865 is about 422.4663371987.

The spelling of 75400865 in words is "seventy-five million, four hundred thousand, eight hundred sixty-five".