78227732 has 48 divisors (see below), whose sum is σ = 156280320. Its totient is φ = 33936000.

The previous prime is 78227717. The next prime is 78227741. The reversal of 78227732 is 23772287.

78227732 = 899² + 900² + ... + 986².

It is a super-2 number, since 2×78227732² = 12239156107727648, which contains 22 as substring.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 128573 + ... + 129179.

It is an arithmetic number, because the mean of its divisors is an integer number (3255840).

Almost surely, 2^78227732 is an apocalyptic number.

It is an amenable number.

78227732 is a deficient number, since it is larger than the sum of its proper divisors (78052588).

78227732 is a wasteful number, since it uses less digits than its factorization.

78227732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752 (or 750 counting only the distinct ones).

The product of its digits is 65856, while the sum is 38.

The square root of 78227732 is about 8844.6442551411. The cubic root of 78227732 is about 427.6812851281.

Subtracting from 78227732 its reverse (23772287), we obtain a palindrome (54455445).

The spelling of 78227732 in words is "seventy-eight million, two hundred twenty-seven thousand, seven hundred thirty-two".