83287578 has 16 divisors (see below), whose sum is σ = 181718496. Its totient is φ = 25238640.

The previous prime is 83287571. The next prime is 83287613. The reversal of 83287578 is 87578238.

It is not an unprimeable number, because it can be changed into a prime (83287571) 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, 630901 + ... + 631032.

It is an arithmetic number, because the mean of its divisors is an integer number (11357406).

Almost surely, 2^83287578 is an apocalyptic number.

83287578 is an abundant number, since it is smaller than the sum of its proper divisors (98430918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

83287578 is a wasteful number, since it uses less digits than its factorization.

83287578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261949.

The product of its digits is 752640, while the sum is 48.

The square root of 83287578 is about 9126.2028248336. The cubic root of 83287578 is about 436.7102758019.

It can be divided in two parts, 832 and 87578, that added together give a triangular number (88410 = T₄₂₀).

The spelling of 83287578 in words is "eighty-three million, two hundred eighty-seven thousand, five hundred seventy-eight".