7742730 has 32 divisors (see below), whose sum is σ = 18891648. Its totient is φ = 2030400.

The previous prime is 7742723. The next prime is 7742737. The reversal of 7742730 is 372477.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7742723) and next prime (7742737).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (7742737) 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, 286 + ... + 3945.

It is an arithmetic number, because the mean of its divisors is an integer number (590364).

Almost surely, 2^7742730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7742730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9445824).

7742730 is an abundant number, since it is smaller than the sum of its proper divisors (11148918).

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

7742730 is a wasteful number, since it uses less digits than its factorization.

7742730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4302.

The product of its (nonzero) digits is 8232, while the sum is 30.

The square root of 7742730 is about 2782.5761445107. The cubic root of 7742730 is about 197.8326818304.

The spelling of 7742730 in words is "seven million, seven hundred forty-two thousand, seven hundred thirty".