772247420 has 24 divisors (see below), whose sum is σ = 1853394144. Its totient is φ = 264770496.

The previous prime is 772247407. The next prime is 772247429. The reversal of 772247420 is 24742277.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (772247429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2757887 + ... + 2758166.

It is an arithmetic number, because the mean of its divisors is an integer number (77224756).

Almost surely, 2^772247420 is an apocalyptic number.

772247420 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

772247420 is an abundant number, since it is smaller than the sum of its proper divisors (1081146724).

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

772247420 is a wasteful number, since it uses less digits than its factorization.

772247420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5516069 (or 5516067 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 35.

The square root of 772247420 is about 27789.3400425415. The cubic root of 772247420 is about 917.4565143088.

Adding to 772247420 its reverse (24742277), we get a palindrome (796989697).

The spelling of 772247420 in words is "seven hundred seventy-two million, two hundred forty-seven thousand, four hundred twenty".