7742990 has 32 divisors (see below), whose sum is σ = 15168384. Its totient is φ = 2833920.

The previous prime is 7742957. The next prime is 7742993. The reversal of 7742990 is 992477.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7742993) 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 15 ways as a sum of consecutive naturals, for example, 5675 + ... + 6905.

It is an arithmetic number, because the mean of its divisors is an integer number (474012).

Almost surely, 2^7742990 is an apocalyptic number.

7742990 is a deficient number, since it is larger than the sum of its proper divisors (7425394).

7742990 is a wasteful number, since it uses less digits than its factorization.

7742990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1292.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 7742990 is about 2782.6228634150. The cubic root of 7742990 is about 197.8348962053.

The spelling of 7742990 in words is "seven million, seven hundred forty-two thousand, nine hundred ninety".