82578738 has 32 divisors (see below), whose sum is σ = 180652032. Its totient is φ = 24957200.

The previous prime is 82578737. The next prime is 82578757. The reversal of 82578738 is 83787528.

It is a super-3 number, since 3×82578738³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (82578737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26995 + ... + 29897.

It is an arithmetic number, because the mean of its divisors is an integer number (5645376).

Almost surely, 2^82578738 is an apocalyptic number.

82578738 is an abundant number, since it is smaller than the sum of its proper divisors (98073294).

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

82578738 is a wasteful number, since it uses less digits than its factorization.

82578738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3350.

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

The square root of 82578738 is about 9087.2844128485. The cubic root of 82578738 is about 435.4678333111.

The spelling of 82578738 in words is "eighty-two million, five hundred seventy-eight thousand, seven hundred thirty-eight".