7742920 has 16 divisors (see below), whose sum is σ = 17421660. Its totient is φ = 3097152.

The previous prime is 7742887. The next prime is 7742923. The reversal of 7742920 is 292477.

It is a happy number.

7742920 is nontrivially palindromic in base 3.

It can be written as a sum of positive squares in 2 ways, for example, as 7584516 + 158404 = 2754^2 + 398^2 .

It is not an unprimeable number, because it can be changed into a prime (7742923) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 96747 + ... + 96826.

Almost surely, 2^7742920 is an apocalyptic number.

It is an amenable number.

7742920 is an abundant number, since it is smaller than the sum of its proper divisors (9678740).

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

7742920 is a wasteful number, since it uses less digits than its factorization.

7742920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193584 (or 193580 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 7742920 is about 2782.6102853256. The cubic root of 7742920 is about 197.8343000323.

The spelling of 7742920 in words is "seven million, seven hundred forty-two thousand, nine hundred twenty".