76870645 has 8 divisors (see below), whose sum is σ = 94738104. Its totient is φ = 59834304.

The previous prime is 76870639. The next prime is 76870649. The reversal of 76870645 is 54607867.

It can be written as a sum of positive squares in 4 ways, for example, as 6461764 + 70408881 = 2542^2 + 8391^2 .

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 76870645 - 2⁷ = 76870517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76870649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207574 + ... + 207943.

It is an arithmetic number, because the mean of its divisors is an integer number (11842263).

Almost surely, 2^76870645 is an apocalyptic number.

It is an amenable number.

76870645 is a deficient number, since it is larger than the sum of its proper divisors (17867459).

76870645 is a wasteful number, since it uses less digits than its factorization.

76870645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415559.

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 76870645 is about 8767.5906040371. The cubic root of 76870645 is about 425.1937202217.

The spelling of 76870645 in words is "seventy-six million, eight hundred seventy thousand, six hundred forty-five".